Cloud Managed Networks

Hello Community,

we are managing more than 100 APs with Aruba Central (EU Cloud) and got al lot of Alarms with message:

"Radio frames retry percent on 5 (also 2.4 GHz) Channel 60E has been above 90% for about 15 minutes since 2023-09-27 12:14:02 UTC on AP xyz"

APs are running AOS 10 (10.4.0.2) and we are using Auto Power and Auto Channel. 

Please can someone explain what could be the reason for this?

What is the best way to troubleshoot this issue?

Cheers Michael

60E means that you are running an 80mhz wide channel.  That provides the fastest transmit speed for clients that support it, but also the largest interference surface because of channel width and the limited number of 80mhz wide channels.  I would uncheck 80mhz wide channels to avoid the interference at your next maintenance window.

Hello Community,

we are managing more than 100 APs with Aruba Central (EU Cloud) and got al lot of Alarms with message:

"Radio frames retry percent on 5 (also 2.4 GHz) Channel 60E has been above 90% for about 15 minutes since 2023-09-27 12:14:02 UTC on AP xyz"

APs are running AOS 10 (10.4.0.2) and we are using Auto Power and Auto Channel. 

Please can someone explain what could be the reason for this?

What is the best way to troubleshoot this issue?

Cheers Michael

thx for your information - I'll check that, but I got same issue at 2.4GHz Band, where is no 80MHz-wide channel:

Radio frames retry percent on 2.4 GHz Channel 6 has been above 90% for about 15 minutes since 2023-09-29 06:54:02 UTC on AP xyz with 0 connected clients

Settings 2.4GHz:

I guess that's maybe a bug of AOS10 ...

60E means that you are running an 80mhz wide channel.  That provides the fastest transmit speed for clients that support it, but also the largest interference surface because of channel width and the limited number of 80mhz wide channels.  I would uncheck 80mhz wide channels to avoid the interference at your next maintenance window.

Hello Community,

we are managing more than 100 APs with Aruba Central (EU Cloud) and got al lot of Alarms with message:

"Radio frames retry percent on 5 (also 2.4 GHz) Channel 60E has been above 90% for about 15 minutes since 2023-09-27 12:14:02 UTC on AP xyz"

APs are running AOS 10 (10.4.0.2) and we are using Auto Power and Auto Channel. 

Please can someone explain what could be the reason for this?

What is the best way to troubleshoot this issue?

Cheers Michael

Hello Community,

we are managing more than 100 APs with Aruba Central (EU Cloud) and got al lot of Alarms with message:

"Radio frames retry percent on 5 (also 2.4 GHz) Channel 60E has been above 90% for about 15 minutes since 2023-09-27 12:14:02 UTC on AP xyz"

APs are running AOS 10 (10.4.0.2) and we are using Auto Power and Auto Channel. 

Please can someone explain what could be the reason for this?

What is the best way to troubleshoot this issue?

Cheers Michael

Is this on specific APs? Or on all APs?

In what type of environments are these APs deployed? Is it high density? Or in a place with many neighbors that have WiFi deployed?

Could it be that there is a lot of RF interference in this place?

You may use spectrum analysis tools (external or built in to the AP) to get a better understanding of your RF Environment.

Hello Community,

we are managing more than 100 APs with Aruba Central (EU Cloud) and got al lot of Alarms with message:

"Radio frames retry percent on 5 (also 2.4 GHz) Channel 60E has been above 90% for about 15 minutes since 2023-09-27 12:14:02 UTC on AP xyz"

APs are running AOS 10 (10.4.0.2) and we are using Auto Power and Auto Channel. 

Please can someone explain what could be the reason for this?

What is the best way to troubleshoot this issue?

Cheers Michael

Hi Rob,

thx for your information.

Environment is "normal density" with around 15-20m distance between APs. No high amount of neigbors with autonom WiFi.

I can see the problem at a lot of different APs :

I changed Channel Width to 20 / 40MHz - so no more 80 MHz.

Here you can see WiFi Power range:

I though that central is managing WiFI Setup with auto-power and auto-channel automatically!

Cheers

Michael

PS: I will check interference with Ekahau Tool.

Is this on specific APs? Or on all APs?

In what type of environments are these APs deployed? Is it high density? Or in a place with many neighbors that have WiFi deployed?

Could it be that there is a lot of RF interference in this place?

You may use spectrum analysis tools (external or built in to the AP) to get a better understanding of your RF Environment.

Hello Community,

we are managing more than 100 APs with Aruba Central (EU Cloud) and got al lot of Alarms with message:

"Radio frames retry percent on 5 (also 2.4 GHz) Channel 60E has been above 90% for about 15 minutes since 2023-09-27 12:14:02 UTC on AP xyz"

APs are running AOS 10 (10.4.0.2) and we are using Auto Power and Auto Channel. 

Please can someone explain what could be the reason for this?

What is the best way to troubleshoot this issue?

Cheers Michael

Question:

Do you have any issues with client performance?  The retries message could be erroneous (few frames generating a large percentage of retries).

Hi Rob,

thx for your information.

Environment is "normal density" with around 15-20m distance between APs. No high amount of neigbors with autonom WiFi.

I can see the problem at a lot of different APs :

I changed Channel Width to 20 / 40MHz - so no more 80 MHz.

Here you can see WiFi Power range:

I though that central is managing WiFI Setup with auto-power and auto-channel automatically!

Cheers

Michael

PS: I will check interference with Ekahau Tool.

Is this on specific APs? Or on all APs?

In what type of environments are these APs deployed? Is it high density? Or in a place with many neighbors that have WiFi deployed?

Could it be that there is a lot of RF interference in this place?

You may use spectrum analysis tools (external or built in to the AP) to get a better understanding of your RF Environment.

Hello Community,

we are managing more than 100 APs with Aruba Central (EU Cloud) and got al lot of Alarms with message:

"Radio frames retry percent on 5 (also 2.4 GHz) Channel 60E has been above 90% for about 15 minutes since 2023-09-27 12:14:02 UTC on AP xyz"

APs are running AOS 10 (10.4.0.2) and we are using Auto Power and Auto Channel. 

Please can someone explain what could be the reason for this?

What is the best way to troubleshoot this issue?

Cheers Michael

Hi Colin,

customer is not reporting any client issues. Which next troubleshooting steps do you suggest?

Customer can see Alarms and he's getting nervous.

Should I contact support team?

Cheers Mic

Original Message:
Sent: Oct 04, 2023 06:59 AM
From: Colin Joseph
Subject: too much Radio frames retry with AOS10 and Central

Question:

Do you have any issues with client performance?  The retries message could be erroneous (few frames generating a large percentage of retries).

------------------------------
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Original Message:
Sent: Oct 04, 2023 06:52 AM
From: Hoffmann_Mi
Subject: too much Radio frames retry with AOS10 and Central

Hi Rob,

thx for your information.

Environment is "normal density" with around 15-20m distance between APs. No high amount of neigbors with autonom WiFi.

I can see the problem at a lot of different APs :

I changed Channel Width to 20 / 40MHz - so no more 80 MHz.

Here you can see WiFi Power range:

I though that central is managing WiFI Setup with auto-power and auto-channel automatically!

Cheers

Michael

PS: I will check interference with Ekahau Tool.

Original Message:
Sent: Oct 03, 2023 09:05 AM
From: Herman Robers
Subject: too much Radio frames retry with AOS10 and Central

Is this on specific APs? Or on all APs?

In what type of environments are these APs deployed? Is it high density? Or in a place with many neighbors that have WiFi deployed?

Could it be that there is a lot of RF interference in this place?

You may use spectrum analysis tools (external or built in to the AP) to get a better understanding of your RF Environment.

------------------------------
Herman Robers
------------------------
If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.

Original Message:
Sent: Sep 28, 2023 03:02 AM
From: Hoffmann_Mi
Subject: too much Radio frames retry with AOS10 and Central

Hello Community,

we are managing more than 100 APs with Aruba Central (EU Cloud) and got al lot of Alarms with message:

"Radio frames retry percent on 5 (also 2.4 GHz) Channel 60E has been above 90% for about 15 minutes since 2023-09-27 12:14:02 UTC on AP xyz"

APs are running AOS 10 (10.4.0.2) and we are using Auto Power and Auto Channel. 

Please can someone explain what could be the reason for this?

What is the best way to troubleshoot this issue?

Cheers Michael