Controllerless Networks

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

I cannot believe that. Can you open an Aruba TAC Case please.

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

I cannot believe that. Can you open an Aruba TAC Case please.

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

I cannot believe that. Can you open an Aruba TAC Case please.

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

I'll know it for later... Thanks

But for the time being, any more idea ?

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

I cannot believe that. Can you open an Aruba TAC Case please.

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

I'll know it for later... Thanks

But for the time being, any more idea ?

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

I cannot believe that. Can you open an Aruba TAC Case please.

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Also, did you disable

• 80 MHz Support
• wide-bands 5GHz

from arm Profile?

whci Software Version are you using now?

Original Message:
Sent: Jun 13, 2023 06:03 AM
From: Cedimp
Subject: AP303 - loosing devices

I'll know it for later... Thanks

But for the time being, any more idea ?

Original Message:
Sent: Jun 12, 2023 04:07 AM
From: cordless
Subject: AP303 - loosing devices

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

Original Message:
Sent: Jun 09, 2023 09:13 AM
From: Cedimp
Subject: AP303 - loosing devices

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

Original Message:
Sent: Jun 09, 2023 08:08 AM
From: cordless
Subject: AP303 - loosing devices

I cannot believe that. Can you open an Aruba TAC Case please.

Original Message:
Sent: Jun 09, 2023 07:49 AM
From: C S
Subject: AP303 - loosing devices

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Original Message:
Sent: Jun 08, 2023 07:34 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Original Message:
Sent: Jun 08, 2023 05:43 AM
From: cordless
Subject: AP303 - loosing devices

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Original Message:
Sent: Jun 08, 2023 05:14 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Original Message:
Sent: Jun 06, 2023 03:33 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Original Message:
Sent: Jun 06, 2023 03:19 AM
From: cordless
Subject: AP303 - loosing devices

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Original Message:
Sent: Jun 06, 2023 02:38 AM
From: Cedimp
Subject: AP303 - loosing devices

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi,

Really sorry i totally missed you replies !

Attached are all the "show" you asked me.

The device IP we are talking about are 192.168.0.111/112/189 (all connected to 2.4 GHz)

No, i did  not disabled both lines you asked me as it was written "if no modern devices are used". Indeed some computers are connected on 2.4 and 5 GHz. But i can do it if it is not a problem for devices that are connected, i do not mind if they are less optimized, more important are the bar code scanner

My version is :

B02-Etage-e9:aa# sh ver
Aruba Operating System Software.
ArubaOS (MODEL: 303), Version 8.10.0.6 LSR
Website: http://www.arubanetworks.com
(c) Copyright 2023 Hewlett Packard Enterprise Development LP.
Compiled on 2023-02-14 at 18:20:47 PST (build 86193) by jenkins
FIPS Mode :disabled

AP uptime is 1 week 3 days 21 hours 43 minutes 13 seconds
Reboot Time and Cause: AP rebooted Thu Jun 8 13:31:37 CEST 2023; System cmd at uptime 8D 16H 53M 54S: Image Upgrade Successful

Be aware that i'm still pinging all devices 5 times per second and it works all the day, all "show" were done while "spam ping" is active, if you needd also without please tell me

Many thanks !

Original Message:
Sent: Jun 14, 2023 03:37 AM
From: cordless
Subject: AP303 - loosing devices

Also, did you disable

• 80 MHz Support
• wide-bands 5GHz

from arm Profile?

whci Software Version are you using now?

Original Message:
Sent: Jun 13, 2023 06:03 AM
From: Cedimp
Subject: AP303 - loosing devices

I'll know it for later... Thanks

But for the time being, any more idea ?

Original Message:
Sent: Jun 12, 2023 04:07 AM
From: cordless
Subject: AP303 - loosing devices

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

Original Message:
Sent: Jun 09, 2023 09:13 AM
From: Cedimp
Subject: AP303 - loosing devices

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

Original Message:
Sent: Jun 09, 2023 08:08 AM
From: cordless
Subject: AP303 - loosing devices

I cannot believe that. Can you open an Aruba TAC Case please.

Original Message:
Sent: Jun 09, 2023 07:49 AM
From: C S
Subject: AP303 - loosing devices

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Original Message:
Sent: Jun 08, 2023 07:34 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Original Message:
Sent: Jun 08, 2023 05:43 AM
From: cordless
Subject: AP303 - loosing devices

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Original Message:
Sent: Jun 08, 2023 05:14 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Original Message:
Sent: Jun 06, 2023 03:33 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Original Message:
Sent: Jun 06, 2023 03:19 AM
From: cordless
Subject: AP303 - loosing devices

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Original Message:
Sent: Jun 06, 2023 02:38 AM
From: Cedimp
Subject: AP303 - loosing devices

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Thanks for the output.

From what I can see are those scanner connected to the optimal AP with good connection status:

00:23:68:d3:49:76  Normal    1          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  16    2m:17s
                                                   No     dc:b7:ac:ee:a9:20            16    2m:39s
                                                   No     dc:b7:ac:ee:95:e0            41    2m:21s
                                                   No     dc:b7:ac:ee:72:60            32    1m:49s
                                                   No     dc:b7:ac:ee:84:20            22    20s
                                                   Yes    dc:b7:ac:ee:70:40            44    26s <- he connected to the best AP (the list shows all APs which are "hearing" this Client)

00:23:68:f9:01:5d  Normal    2          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  14    2m:17s
                                                   No     dc:b7:ac:ee:72:60            27    1m:49s
                                                   No     dc:b7:ac:ee:95:e0            27    2m:21s
                                                   No     dc:b7:ac:ee:84:20            16    20s
                                                   Yes    dc:b7:ac:ee:70:40            59    26s <- same here

Changing 80MHz Support or Wide-Bands on 5GHz will have impact to the clients which are connected on those channels whic will be taken out of the operating spectrum. But it will have no impact for the Scanners which you have issues with, since they are connected to 2.4GHz.

show ap debug auth-trace-buf - there are no authentication issues seen and from the logs it all seems very good.

what we can do is trying to set the 2.4GHz SSID to Legacy Mode, means disableing 802.11n/ac.

This can be done by disabling this on the WLAN SSID Profile - https://www.arubanetworks.com/techdocs/CLI-Bank/Content/instant/wlan-ssid-prof.htm

high-efficiency-disable

very-high-throughput-disable

high-throughput-disable

Reference - https://www.arubanetworks.com/techdocs/Instant_810_WebHelp/Content/instant-ug/wlan-ssid-conf/hew.htm

another try after this above could be to disable MU-MIMO, but that will be the next try.

Hi,

Really sorry i totally missed you replies !

Attached are all the "show" you asked me.

The device IP we are talking about are 192.168.0.111/112/189 (all connected to 2.4 GHz)

No, i did  not disabled both lines you asked me as it was written "if no modern devices are used". Indeed some computers are connected on 2.4 and 5 GHz. But i can do it if it is not a problem for devices that are connected, i do not mind if they are less optimized, more important are the bar code scanner

My version is :

B02-Etage-e9:aa# sh ver
Aruba Operating System Software.
ArubaOS (MODEL: 303), Version 8.10.0.6 LSR
Website: http://www.arubanetworks.com
(c) Copyright 2023 Hewlett Packard Enterprise Development LP.
Compiled on 2023-02-14 at 18:20:47 PST (build 86193) by jenkins
FIPS Mode :disabled

AP uptime is 1 week 3 days 21 hours 43 minutes 13 seconds
Reboot Time and Cause: AP rebooted Thu Jun 8 13:31:37 CEST 2023; System cmd at uptime 8D 16H 53M 54S: Image Upgrade Successful

Be aware that i'm still pinging all devices 5 times per second and it works all the day, all "show" were done while "spam ping" is active, if you needd also without please tell me

Many thanks !

Original Message:
Sent: Jun 14, 2023 03:37 AM
From: cordless
Subject: AP303 - loosing devices

Also, did you disable

• 80 MHz Support
• wide-bands 5GHz

from arm Profile?

whci Software Version are you using now?

Original Message:
Sent: Jun 13, 2023 06:03 AM
From: Cedimp
Subject: AP303 - loosing devices

I'll know it for later... Thanks

But for the time being, any more idea ?

Original Message:
Sent: Jun 12, 2023 04:07 AM
From: cordless
Subject: AP303 - loosing devices

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

Original Message:
Sent: Jun 09, 2023 09:13 AM
From: Cedimp
Subject: AP303 - loosing devices

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

Original Message:
Sent: Jun 09, 2023 08:08 AM
From: cordless
Subject: AP303 - loosing devices

I cannot believe that. Can you open an Aruba TAC Case please.

Original Message:
Sent: Jun 09, 2023 07:49 AM
From: C S
Subject: AP303 - loosing devices

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Original Message:
Sent: Jun 08, 2023 07:34 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Original Message:
Sent: Jun 08, 2023 05:43 AM
From: cordless
Subject: AP303 - loosing devices

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Original Message:
Sent: Jun 08, 2023 05:14 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Original Message:
Sent: Jun 06, 2023 03:33 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Original Message:
Sent: Jun 06, 2023 03:19 AM
From: cordless
Subject: AP303 - loosing devices

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Original Message:
Sent: Jun 06, 2023 02:38 AM
From: Cedimp
Subject: AP303 - loosing devices

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi,

this sounds good, i'll then find a moment with my customer to change 80 Mhz and wide-band and then go to legacy mode. I'll keep you update.

Thanks for the output.

From what I can see are those scanner connected to the optimal AP with good connection status:

00:23:68:d3:49:76  Normal    1          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  16    2m:17s
                                                   No     dc:b7:ac:ee:a9:20            16    2m:39s
                                                   No     dc:b7:ac:ee:95:e0            41    2m:21s
                                                   No     dc:b7:ac:ee:72:60            32    1m:49s
                                                   No     dc:b7:ac:ee:84:20            22    20s
                                                   Yes    dc:b7:ac:ee:70:40            44    26s <- he connected to the best AP (the list shows all APs which are "hearing" this Client)

00:23:68:f9:01:5d  Normal    2          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  14    2m:17s
                                                   No     dc:b7:ac:ee:72:60            27    1m:49s
                                                   No     dc:b7:ac:ee:95:e0            27    2m:21s
                                                   No     dc:b7:ac:ee:84:20            16    20s
                                                   Yes    dc:b7:ac:ee:70:40            59    26s <- same here

Changing 80MHz Support or Wide-Bands on 5GHz will have impact to the clients which are connected on those channels whic will be taken out of the operating spectrum. But it will have no impact for the Scanners which you have issues with, since they are connected to 2.4GHz.

show ap debug auth-trace-buf - there are no authentication issues seen and from the logs it all seems very good.

what we can do is trying to set the 2.4GHz SSID to Legacy Mode, means disableing 802.11n/ac.

This can be done by disabling this on the WLAN SSID Profile - https://www.arubanetworks.com/techdocs/CLI-Bank/Content/instant/wlan-ssid-prof.htm

high-efficiency-disable

very-high-throughput-disable

high-throughput-disable

Reference - https://www.arubanetworks.com/techdocs/Instant_810_WebHelp/Content/instant-ug/wlan-ssid-conf/hew.htm

another try after this above could be to disable MU-MIMO, but that will be the next try.

Hi,

Really sorry i totally missed you replies !

Attached are all the "show" you asked me.

The device IP we are talking about are 192.168.0.111/112/189 (all connected to 2.4 GHz)

No, i did  not disabled both lines you asked me as it was written "if no modern devices are used". Indeed some computers are connected on 2.4 and 5 GHz. But i can do it if it is not a problem for devices that are connected, i do not mind if they are less optimized, more important are the bar code scanner

My version is :

B02-Etage-e9:aa# sh ver
Aruba Operating System Software.
ArubaOS (MODEL: 303), Version 8.10.0.6 LSR
Website: http://www.arubanetworks.com
(c) Copyright 2023 Hewlett Packard Enterprise Development LP.
Compiled on 2023-02-14 at 18:20:47 PST (build 86193) by jenkins
FIPS Mode :disabled

AP uptime is 1 week 3 days 21 hours 43 minutes 13 seconds
Reboot Time and Cause: AP rebooted Thu Jun 8 13:31:37 CEST 2023; System cmd at uptime 8D 16H 53M 54S: Image Upgrade Successful

Be aware that i'm still pinging all devices 5 times per second and it works all the day, all "show" were done while "spam ping" is active, if you needd also without please tell me

Many thanks !

Original Message:
Sent: Jun 14, 2023 03:37 AM
From: cordless
Subject: AP303 - loosing devices

Also, did you disable

• 80 MHz Support
• wide-bands 5GHz

from arm Profile?

whci Software Version are you using now?

Original Message:
Sent: Jun 13, 2023 06:03 AM
From: Cedimp
Subject: AP303 - loosing devices

I'll know it for later... Thanks

But for the time being, any more idea ?

Original Message:
Sent: Jun 12, 2023 04:07 AM
From: cordless
Subject: AP303 - loosing devices

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

Original Message:
Sent: Jun 09, 2023 09:13 AM
From: Cedimp
Subject: AP303 - loosing devices

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

Original Message:
Sent: Jun 09, 2023 08:08 AM
From: cordless
Subject: AP303 - loosing devices

I cannot believe that. Can you open an Aruba TAC Case please.

Original Message:
Sent: Jun 09, 2023 07:49 AM
From: C S
Subject: AP303 - loosing devices

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Original Message:
Sent: Jun 08, 2023 07:34 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Original Message:
Sent: Jun 08, 2023 05:43 AM
From: cordless
Subject: AP303 - loosing devices

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Original Message:
Sent: Jun 08, 2023 05:14 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Original Message:
Sent: Jun 06, 2023 03:33 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Original Message:
Sent: Jun 06, 2023 03:19 AM
From: cordless
Subject: AP303 - loosing devices

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Original Message:
Sent: Jun 06, 2023 02:38 AM
From: Cedimp
Subject: AP303 - loosing devices

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi,

just to tell you i did not forget you, but my customer did ! 

I'm trying to kniw when he will be able to do changes and tests

I'll keep you updated for sure.

Hi,

this sounds good, i'll then find a moment with my customer to change 80 Mhz and wide-band and then go to legacy mode. I'll keep you update.

Thanks for the output.

From what I can see are those scanner connected to the optimal AP with good connection status:

00:23:68:d3:49:76  Normal    1          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  16    2m:17s
                                                   No     dc:b7:ac:ee:a9:20            16    2m:39s
                                                   No     dc:b7:ac:ee:95:e0            41    2m:21s
                                                   No     dc:b7:ac:ee:72:60            32    1m:49s
                                                   No     dc:b7:ac:ee:84:20            22    20s
                                                   Yes    dc:b7:ac:ee:70:40            44    26s <- he connected to the best AP (the list shows all APs which are "hearing" this Client)

00:23:68:f9:01:5d  Normal    2          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  14    2m:17s
                                                   No     dc:b7:ac:ee:72:60            27    1m:49s
                                                   No     dc:b7:ac:ee:95:e0            27    2m:21s
                                                   No     dc:b7:ac:ee:84:20            16    20s
                                                   Yes    dc:b7:ac:ee:70:40            59    26s <- same here

Changing 80MHz Support or Wide-Bands on 5GHz will have impact to the clients which are connected on those channels whic will be taken out of the operating spectrum. But it will have no impact for the Scanners which you have issues with, since they are connected to 2.4GHz.

show ap debug auth-trace-buf - there are no authentication issues seen and from the logs it all seems very good.

what we can do is trying to set the 2.4GHz SSID to Legacy Mode, means disableing 802.11n/ac.

This can be done by disabling this on the WLAN SSID Profile - https://www.arubanetworks.com/techdocs/CLI-Bank/Content/instant/wlan-ssid-prof.htm

high-efficiency-disable

very-high-throughput-disable

high-throughput-disable

Reference - https://www.arubanetworks.com/techdocs/Instant_810_WebHelp/Content/instant-ug/wlan-ssid-conf/hew.htm

another try after this above could be to disable MU-MIMO, but that will be the next try.

Hi,

Really sorry i totally missed you replies !

Attached are all the "show" you asked me.

The device IP we are talking about are 192.168.0.111/112/189 (all connected to 2.4 GHz)

No, i did  not disabled both lines you asked me as it was written "if no modern devices are used". Indeed some computers are connected on 2.4 and 5 GHz. But i can do it if it is not a problem for devices that are connected, i do not mind if they are less optimized, more important are the bar code scanner

My version is :

B02-Etage-e9:aa# sh ver
Aruba Operating System Software.
ArubaOS (MODEL: 303), Version 8.10.0.6 LSR
Website: http://www.arubanetworks.com
(c) Copyright 2023 Hewlett Packard Enterprise Development LP.
Compiled on 2023-02-14 at 18:20:47 PST (build 86193) by jenkins
FIPS Mode :disabled

AP uptime is 1 week 3 days 21 hours 43 minutes 13 seconds
Reboot Time and Cause: AP rebooted Thu Jun 8 13:31:37 CEST 2023; System cmd at uptime 8D 16H 53M 54S: Image Upgrade Successful

Be aware that i'm still pinging all devices 5 times per second and it works all the day, all "show" were done while "spam ping" is active, if you needd also without please tell me

Many thanks !

Original Message:
Sent: Jun 14, 2023 03:37 AM
From: cordless
Subject: AP303 - loosing devices

Also, did you disable

• 80 MHz Support
• wide-bands 5GHz

from arm Profile?

whci Software Version are you using now?

Original Message:
Sent: Jun 13, 2023 06:03 AM
From: Cedimp
Subject: AP303 - loosing devices

I'll know it for later... Thanks

But for the time being, any more idea ?

Original Message:
Sent: Jun 12, 2023 04:07 AM
From: cordless
Subject: AP303 - loosing devices

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

Original Message:
Sent: Jun 09, 2023 09:13 AM
From: Cedimp
Subject: AP303 - loosing devices

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

Original Message:
Sent: Jun 09, 2023 08:08 AM
From: cordless
Subject: AP303 - loosing devices

I cannot believe that. Can you open an Aruba TAC Case please.

Original Message:
Sent: Jun 09, 2023 07:49 AM
From: C S
Subject: AP303 - loosing devices

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Original Message:
Sent: Jun 08, 2023 07:34 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Original Message:
Sent: Jun 08, 2023 05:43 AM
From: cordless
Subject: AP303 - loosing devices

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Original Message:
Sent: Jun 08, 2023 05:14 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Original Message:
Sent: Jun 06, 2023 03:33 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Original Message:
Sent: Jun 06, 2023 03:19 AM
From: cordless
Subject: AP303 - loosing devices

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Original Message:
Sent: Jun 06, 2023 02:38 AM
From: Cedimp
Subject: AP303 - loosing devices

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi, here are some (bad) news.

I did the changes to the conf (please see attached file, we did many changes since the beginning) did the "commit apply" but this is not better.

Still same behaviour : when we ping at least 5-6 times per seconds each device the customer tells me all is ok it work fluently with no disconnect.

Without these ping the program on the device is disconnecting often

Really weird, any more ideas ?

Thanks a lot

Cedric

Hi,

just to tell you i did not forget you, but my customer did ! 

I'm trying to kniw when he will be able to do changes and tests

I'll keep you updated for sure.

Hi,

this sounds good, i'll then find a moment with my customer to change 80 Mhz and wide-band and then go to legacy mode. I'll keep you update.

Thanks for the output.

From what I can see are those scanner connected to the optimal AP with good connection status:

00:23:68:d3:49:76  Normal    1          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  16    2m:17s
                                                   No     dc:b7:ac:ee:a9:20            16    2m:39s
                                                   No     dc:b7:ac:ee:95:e0            41    2m:21s
                                                   No     dc:b7:ac:ee:72:60            32    1m:49s
                                                   No     dc:b7:ac:ee:84:20            22    20s
                                                   Yes    dc:b7:ac:ee:70:40            44    26s <- he connected to the best AP (the list shows all APs which are "hearing" this Client)

00:23:68:f9:01:5d  Normal    2          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  14    2m:17s
                                                   No     dc:b7:ac:ee:72:60            27    1m:49s
                                                   No     dc:b7:ac:ee:95:e0            27    2m:21s
                                                   No     dc:b7:ac:ee:84:20            16    20s
                                                   Yes    dc:b7:ac:ee:70:40            59    26s <- same here

Changing 80MHz Support or Wide-Bands on 5GHz will have impact to the clients which are connected on those channels whic will be taken out of the operating spectrum. But it will have no impact for the Scanners which you have issues with, since they are connected to 2.4GHz.

show ap debug auth-trace-buf - there are no authentication issues seen and from the logs it all seems very good.

what we can do is trying to set the 2.4GHz SSID to Legacy Mode, means disableing 802.11n/ac.

This can be done by disabling this on the WLAN SSID Profile - https://www.arubanetworks.com/techdocs/CLI-Bank/Content/instant/wlan-ssid-prof.htm

high-efficiency-disable

very-high-throughput-disable

high-throughput-disable

Reference - https://www.arubanetworks.com/techdocs/Instant_810_WebHelp/Content/instant-ug/wlan-ssid-conf/hew.htm

another try after this above could be to disable MU-MIMO, but that will be the next try.

Hi,

Really sorry i totally missed you replies !

Attached are all the "show" you asked me.

The device IP we are talking about are 192.168.0.111/112/189 (all connected to 2.4 GHz)

No, i did  not disabled both lines you asked me as it was written "if no modern devices are used". Indeed some computers are connected on 2.4 and 5 GHz. But i can do it if it is not a problem for devices that are connected, i do not mind if they are less optimized, more important are the bar code scanner

My version is :

B02-Etage-e9:aa# sh ver
Aruba Operating System Software.
ArubaOS (MODEL: 303), Version 8.10.0.6 LSR
Website: http://www.arubanetworks.com
(c) Copyright 2023 Hewlett Packard Enterprise Development LP.
Compiled on 2023-02-14 at 18:20:47 PST (build 86193) by jenkins
FIPS Mode :disabled

AP uptime is 1 week 3 days 21 hours 43 minutes 13 seconds
Reboot Time and Cause: AP rebooted Thu Jun 8 13:31:37 CEST 2023; System cmd at uptime 8D 16H 53M 54S: Image Upgrade Successful

Be aware that i'm still pinging all devices 5 times per second and it works all the day, all "show" were done while "spam ping" is active, if you needd also without please tell me

Many thanks !

Original Message:
Sent: Jun 14, 2023 03:37 AM
From: cordless
Subject: AP303 - loosing devices

Also, did you disable

• 80 MHz Support
• wide-bands 5GHz

from arm Profile?

whci Software Version are you using now?

Original Message:
Sent: Jun 13, 2023 06:03 AM
From: Cedimp
Subject: AP303 - loosing devices

I'll know it for later... Thanks

But for the time being, any more idea ?

Original Message:
Sent: Jun 12, 2023 04:07 AM
From: cordless
Subject: AP303 - loosing devices

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

Original Message:
Sent: Jun 09, 2023 09:13 AM
From: Cedimp
Subject: AP303 - loosing devices

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

Original Message:
Sent: Jun 09, 2023 08:08 AM
From: cordless
Subject: AP303 - loosing devices

I cannot believe that. Can you open an Aruba TAC Case please.

Original Message:
Sent: Jun 09, 2023 07:49 AM
From: C S
Subject: AP303 - loosing devices

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Original Message:
Sent: Jun 08, 2023 07:34 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Original Message:
Sent: Jun 08, 2023 05:43 AM
From: cordless
Subject: AP303 - loosing devices

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Original Message:
Sent: Jun 08, 2023 05:14 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Original Message:
Sent: Jun 06, 2023 03:33 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Original Message:
Sent: Jun 06, 2023 03:19 AM
From: cordless
Subject: AP303 - loosing devices

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Original Message:
Sent: Jun 06, 2023 02:38 AM
From: Cedimp
Subject: AP303 - loosing devices

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi there,

any more idea about this issue ?

Is my conf now ok ?

thanks

Cédric

Hi, here are some (bad) news.

I did the changes to the conf (please see attached file, we did many changes since the beginning) did the "commit apply" but this is not better.

Still same behaviour : when we ping at least 5-6 times per seconds each device the customer tells me all is ok it work fluently with no disconnect.

Without these ping the program on the device is disconnecting often

Really weird, any more ideas ?

Thanks a lot

Cedric

Hi,

just to tell you i did not forget you, but my customer did ! 

I'm trying to kniw when he will be able to do changes and tests

I'll keep you updated for sure.

Hi,

this sounds good, i'll then find a moment with my customer to change 80 Mhz and wide-band and then go to legacy mode. I'll keep you update.

Thanks for the output.

From what I can see are those scanner connected to the optimal AP with good connection status:

00:23:68:d3:49:76  Normal    1          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  16    2m:17s
                                                   No     dc:b7:ac:ee:a9:20            16    2m:39s
                                                   No     dc:b7:ac:ee:95:e0            41    2m:21s
                                                   No     dc:b7:ac:ee:72:60            32    1m:49s
                                                   No     dc:b7:ac:ee:84:20            22    20s
                                                   Yes    dc:b7:ac:ee:70:40            44    26s <- he connected to the best AP (the list shows all APs which are "hearing" this Client)

00:23:68:f9:01:5d  Normal    2          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  14    2m:17s
                                                   No     dc:b7:ac:ee:72:60            27    1m:49s
                                                   No     dc:b7:ac:ee:95:e0            27    2m:21s
                                                   No     dc:b7:ac:ee:84:20            16    20s
                                                   Yes    dc:b7:ac:ee:70:40            59    26s <- same here

Changing 80MHz Support or Wide-Bands on 5GHz will have impact to the clients which are connected on those channels whic will be taken out of the operating spectrum. But it will have no impact for the Scanners which you have issues with, since they are connected to 2.4GHz.

show ap debug auth-trace-buf - there are no authentication issues seen and from the logs it all seems very good.

what we can do is trying to set the 2.4GHz SSID to Legacy Mode, means disableing 802.11n/ac.

This can be done by disabling this on the WLAN SSID Profile - https://www.arubanetworks.com/techdocs/CLI-Bank/Content/instant/wlan-ssid-prof.htm

high-efficiency-disable

very-high-throughput-disable

high-throughput-disable

Reference - https://www.arubanetworks.com/techdocs/Instant_810_WebHelp/Content/instant-ug/wlan-ssid-conf/hew.htm

another try after this above could be to disable MU-MIMO, but that will be the next try.

Hi,

Really sorry i totally missed you replies !

Attached are all the "show" you asked me.

The device IP we are talking about are 192.168.0.111/112/189 (all connected to 2.4 GHz)

No, i did  not disabled both lines you asked me as it was written "if no modern devices are used". Indeed some computers are connected on 2.4 and 5 GHz. But i can do it if it is not a problem for devices that are connected, i do not mind if they are less optimized, more important are the bar code scanner

My version is :

B02-Etage-e9:aa# sh ver
Aruba Operating System Software.
ArubaOS (MODEL: 303), Version 8.10.0.6 LSR
Website: http://www.arubanetworks.com
(c) Copyright 2023 Hewlett Packard Enterprise Development LP.
Compiled on 2023-02-14 at 18:20:47 PST (build 86193) by jenkins
FIPS Mode :disabled

AP uptime is 1 week 3 days 21 hours 43 minutes 13 seconds
Reboot Time and Cause: AP rebooted Thu Jun 8 13:31:37 CEST 2023; System cmd at uptime 8D 16H 53M 54S: Image Upgrade Successful

Be aware that i'm still pinging all devices 5 times per second and it works all the day, all "show" were done while "spam ping" is active, if you needd also without please tell me

Many thanks !

Original Message:
Sent: Jun 14, 2023 03:37 AM
From: cordless
Subject: AP303 - loosing devices

Also, did you disable

• 80 MHz Support
• wide-bands 5GHz

from arm Profile?

whci Software Version are you using now?

Original Message:
Sent: Jun 13, 2023 06:03 AM
From: Cedimp
Subject: AP303 - loosing devices

I'll know it for later... Thanks

But for the time being, any more idea ?

Original Message:
Sent: Jun 12, 2023 04:07 AM
From: cordless
Subject: AP303 - loosing devices

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

Original Message:
Sent: Jun 09, 2023 09:13 AM
From: Cedimp
Subject: AP303 - loosing devices

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

Original Message:
Sent: Jun 09, 2023 08:08 AM
From: cordless
Subject: AP303 - loosing devices

I cannot believe that. Can you open an Aruba TAC Case please.

Original Message:
Sent: Jun 09, 2023 07:49 AM
From: C S
Subject: AP303 - loosing devices

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Original Message:
Sent: Jun 08, 2023 07:34 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Original Message:
Sent: Jun 08, 2023 05:43 AM
From: cordless
Subject: AP303 - loosing devices

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Original Message:
Sent: Jun 08, 2023 05:14 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Original Message:
Sent: Jun 06, 2023 03:33 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Original Message:
Sent: Jun 06, 2023 03:19 AM
From: cordless
Subject: AP303 - loosing devices

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Original Message:
Sent: Jun 06, 2023 02:38 AM
From: Cedimp
Subject: AP303 - loosing devices

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot

Hi,

i guess thta there is no more thing to try ?

I'll leave my ping "forever" to keep all alive.

Maybe i'll rollback some changes as they do not solve the issue

If someone has some more ideas, do not hesitate :)

Hi there,

any more idea about this issue ?

Is my conf now ok ?

thanks

Cédric

Hi, here are some (bad) news.

I did the changes to the conf (please see attached file, we did many changes since the beginning) did the "commit apply" but this is not better.

Still same behaviour : when we ping at least 5-6 times per seconds each device the customer tells me all is ok it work fluently with no disconnect.

Without these ping the program on the device is disconnecting often

Really weird, any more ideas ?

Thanks a lot

Cedric

Hi,

just to tell you i did not forget you, but my customer did ! 

I'm trying to kniw when he will be able to do changes and tests

I'll keep you updated for sure.

Hi,

this sounds good, i'll then find a moment with my customer to change 80 Mhz and wide-band and then go to legacy mode. I'll keep you update.

Thanks for the output.

From what I can see are those scanner connected to the optimal AP with good connection status:

00:23:68:d3:49:76  Normal    1          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  16    2m:17s
                                                   No     dc:b7:ac:ee:a9:20            16    2m:39s
                                                   No     dc:b7:ac:ee:95:e0            41    2m:21s
                                                   No     dc:b7:ac:ee:72:60            32    1m:49s
                                                   No     dc:b7:ac:ee:84:20            22    20s
                                                   Yes    dc:b7:ac:ee:70:40            44    26s <- he connected to the best AP (the list shows all APs which are "hearing" this Client)

00:23:68:f9:01:5d  Normal    2          0          No     dc:b7:ac:ee:9a:a0 (Local 1)  14    2m:17s
                                                   No     dc:b7:ac:ee:72:60            27    1m:49s
                                                   No     dc:b7:ac:ee:95:e0            27    2m:21s
                                                   No     dc:b7:ac:ee:84:20            16    20s
                                                   Yes    dc:b7:ac:ee:70:40            59    26s <- same here

Changing 80MHz Support or Wide-Bands on 5GHz will have impact to the clients which are connected on those channels whic will be taken out of the operating spectrum. But it will have no impact for the Scanners which you have issues with, since they are connected to 2.4GHz.

show ap debug auth-trace-buf - there are no authentication issues seen and from the logs it all seems very good.

what we can do is trying to set the 2.4GHz SSID to Legacy Mode, means disableing 802.11n/ac.

This can be done by disabling this on the WLAN SSID Profile - https://www.arubanetworks.com/techdocs/CLI-Bank/Content/instant/wlan-ssid-prof.htm

high-efficiency-disable

very-high-throughput-disable

high-throughput-disable

Reference - https://www.arubanetworks.com/techdocs/Instant_810_WebHelp/Content/instant-ug/wlan-ssid-conf/hew.htm

another try after this above could be to disable MU-MIMO, but that will be the next try.

Hi,

Really sorry i totally missed you replies !

Attached are all the "show" you asked me.

The device IP we are talking about are 192.168.0.111/112/189 (all connected to 2.4 GHz)

No, i did  not disabled both lines you asked me as it was written "if no modern devices are used". Indeed some computers are connected on 2.4 and 5 GHz. But i can do it if it is not a problem for devices that are connected, i do not mind if they are less optimized, more important are the bar code scanner

My version is :

B02-Etage-e9:aa# sh ver
Aruba Operating System Software.
ArubaOS (MODEL: 303), Version 8.10.0.6 LSR
Website: http://www.arubanetworks.com
(c) Copyright 2023 Hewlett Packard Enterprise Development LP.
Compiled on 2023-02-14 at 18:20:47 PST (build 86193) by jenkins
FIPS Mode :disabled

AP uptime is 1 week 3 days 21 hours 43 minutes 13 seconds
Reboot Time and Cause: AP rebooted Thu Jun 8 13:31:37 CEST 2023; System cmd at uptime 8D 16H 53M 54S: Image Upgrade Successful

Be aware that i'm still pinging all devices 5 times per second and it works all the day, all "show" were done while "spam ping" is active, if you needd also without please tell me

Many thanks !

Original Message:
Sent: Jun 14, 2023 03:37 AM
From: cordless
Subject: AP303 - loosing devices

Also, did you disable

• 80 MHz Support
• wide-bands 5GHz

from arm Profile?

whci Software Version are you using now?

Original Message:
Sent: Jun 13, 2023 06:03 AM
From: Cedimp
Subject: AP303 - loosing devices

I'll know it for later... Thanks

But for the time being, any more idea ?

Original Message:
Sent: Jun 12, 2023 04:07 AM
From: cordless
Subject: AP303 - loosing devices

Sorry to say..Yes for TAC assistance you have to have a valid support contract. Without you only have limited lifetime warranty - see details here - https://www.arubanetworks.com/support-services/product-warranties/

If you don´t have a support contract this forum is where you get help.

Original Message:
Sent: Jun 09, 2023 09:13 AM
From: Cedimp
Subject: AP303 - loosing devices

I hope you're right :

I already tried to open a TAC case, but i was told i needed a "Foundation care" to be helped. This is something i do not have, i thought that buying the AP will give me at least access to TAC for some time...

Original Message:
Sent: Jun 09, 2023 08:08 AM
From: cordless
Subject: AP303 - loosing devices

I cannot believe that. Can you open an Aruba TAC Case please.

Original Message:
Sent: Jun 09, 2023 07:49 AM
From: C S
Subject: AP303 - loosing devices

Hi all,

here are some (bad) news...

With downgrade and temporal diversity setting, this is not better.

Yesterday i openned a ticket at Zebra and i have a bad reply, i'll try to translate most important part of it :

"MT2090 are under Windows CE5 and this operating system do not supports  recent wifi systems. That is why it was ok on old Cisco AP"

Do you think i can believe what the engineer said ? Is that possible ?

Thanks and have a nice week-end

Original Message:
Sent: Jun 08, 2023 07:34 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

this solution smell really good and related to my issue.

I'm sorry but i just see your post and then i already send the downgrade (not that much important i guess)

I'll then configure what you said and tell you.

Really thanks for that !

Original Message:
Sent: Jun 08, 2023 05:43 AM
From: cordless
Subject: AP303 - loosing devices

Before downgrading you could test another thing.

For me that sounds like there is an issue regarding those "quite" Clients.

Try to configure temporal-diversity and max-retries on that specific SSID

https://www.arubanetworks.com/techdocs/Instant_811_WebHelp/Content/instant-ug/wlan-ssid-conf/conf-wlan-sett.htm

See at the bottom of the page. This setting is often used for old Clients and for Clients which are not that chatty in WiFi.

Original Message:
Sent: Jun 08, 2023 05:14 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi,

i'm planning the version downgrade with my customer, i hope this is not a problem to put a lower version...

About my post above, does it give some clues ? Now all is working well but i have to ping many tmes per second to keep "something" awake

Thanks

Original Message:
Sent: Jun 06, 2023 03:33 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and thanks for these advices

Yes there are others devices : wifi label printer and laptops that are modern devices.

About 802.11d, in fact we disabled "regulatory domaine verification" on the Zebra devices :)

I'll plan downgrade to version 8.10.0.6 also

To keep everyone updated :

One important thing : now that i ping each Zebra device 6 times per second, the customer tells me that all is fine, it is now confirmed. As said, from my side i can see that ping delay are far better, quite no loss and connexion speed better, so weird.

Original Message:
Sent: Jun 06, 2023 03:19 AM
From: cordless
Subject: AP303 - loosing devices

Hi thanks for posting.

Clients are only those Zebra Barcode Scanners? If so and no "modern" Clients I would suggest to disable 

• 80 MHz Support
• wide-bands 5GHz

from arm Profile

best Practise, especially for Barcode Scanner is to enable 802.11d / 802.11h on RF Profile for do11g and dot11a Radio

As already mention I would suggest the usage of OS Version 8.10.0.6

Original Message:
Sent: Jun 06, 2023 02:38 AM
From: Cedimp
Subject: AP303 - loosing devices

Sorry, i totally forgot to put my conf here as you asked, here it is attached :)

Also from my previous post i can add that pinging a lot like i now do (6 times per seconds) has improved ping delay a lot and under GUI i can also see that the speed reported is also better in Mbps.

Really weird for me. I'm still awaiting customer update to see if they still have issue

Original Message:
Sent: Jun 05, 2023 11:40 AM
From: Cedimp
Subject: AP303 - loosing devices

Many thanks for all these detailed info !

Sorry but english is not my native language and i'd like to have some precisions please

What do you means by "Did you know that Zebra and Aruba has a joint TAC?" : does it mean that they have a set of best pratices or that they have isues between them ? But How can i contact them about that ? Aruba support told me that without a "foundation care support", they won't help me

As per you advice, i'll downgrade AP to 8.10 LTS version

Really many thanks for that

Original Message:
Sent: Jun 05, 2023 11:22 AM
From: cordless
Subject: AP303 - loosing devices

as said vertically is not optimzied.

Would be interesting to push config here to see if there are some config pitfalls in.

Did you know that Zebra and Aruba has a joint TAC?
DIRECT SUPPORT ESCALATION Best-in-class products should have best-in-class support. To ensure that deployed systems continue working at their best, Aruba and Zebra have put in place an engineer-to-engineer escalation program that provide immediate access to the best technical resources to help address issues. Customers and resellers get answers – not finger-pointing – and faster problem resolution.

Source: https://www.arubanetworks.com/partners/technology-partners/partner-finder/partner/?q=/assets/pso/PSO_Zebra.pdf&atp=zebra

On suggestion - you should run a Long Supported Release instead a Short Supported Release as 8.11 is. I woul recommend the usage of the latest 8.10.x which is 8.10.0.6 as of today. 8.11.x brings the usage of AP-615 in and as far as I understand that is not in your environment. 8.10.0.6 is more stable than the 8.11.1.0 Release.

Original Message:
Sent: Jun 05, 2023 10:50 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi and many thanks to both of you for this help,

This is controlerless installation, version is 8.11.1.0_86591 SSR

Devices are Zebra MT2090

They are install vertically, about 3-4 meters height

But it shouldn't be a range problem as they are very near from AP

About RF configuration, this is hard to say if something important changed, i used the default config but i t dedicated the SSID only on 2.4 Ghz). I just try with or without "client match" enabled

Now something really weird : as i was thinking of a timeout problem, from a machine on the network i pinged (using ping tracer program) all 4 devices. As stated above i have about 20-30% loss.

Then change from ping every seconds to ping 6 times per second and now i have a loss of 0.3 %, this is like i have to spam the wifi network to get a good connection.

I asked my customer if this is better now with these ping and will tell you, this should give a clue

Thanks again !

Original Message:
Sent: Jun 05, 2023 09:46 AM
From: cordless
Subject: AP303 - loosing devices

Could you give more insights like:
cotrollerless or controllerbased

Software verion in operation

What type of Clients are this (manufacture / type)

How is the 303 installed (horizonta / vertical)?

on which height?

agree with @Craig Syme those kind of issues are difficult to solve via forum. But let´s give it a try

Original Message:
Sent: Jun 05, 2023 04:37 AM
From: Cedimp
Subject: AP303 - loosing devices

Hi all,

i have an issue on two sites. i have some Windows CE bar code scanners connected using WPA-PSK.

I can ping them but i have many loss (20-30 %) and the the program used on these devices disconnect often (it is using telnet)

What is weird is that I just replace an old Cisco SMB WLC520 that is 10 years old. All was working perfectly, i did not chnage anything BUT the AP, placed at the same place.

People does not roam, they remain quite at the same place, under the AP

AP are up to date.

Any idea please ?

Thanks a lot