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Occasional Contributor II
Posts: 10
Registered: ‎02-06-2012

Phy Type

I can use some clarification on two things, please.  

 

I understand from at least one other post in this forum that 802.11aHT and 802.11gHT actually means 802.11n; so if a client is listed showing either of these Phy Types, they are actually 802.11n clients.  Please tell me if this is incorrect information.

 

What I don't see is an explanation for 802.11b-HT clients.  We have a guest SSID.  Most clients on that SSID are iPads, iPods, iPhones and Androids, and they are all shown to be Phy Types 802.11b-HT.  The guest vap is actually configured to allow band g only.  So I am doubly confused.

 

Thanks for any time anyone can take to respond.

MVP
Posts: 4,271
Registered: ‎07-20-2011

Re: Phy Type

[ Edited ]

 

Yes the 802.11g-HT / a-HT = 802.11n

 

You are still probably have enabled the protection mechanism to allow b clients and also you probably have enabled the HT nder the SSID where you can define the HT settings.

 

http://www.arubanetworks.com/pdf/technology/whitepapers/wp_Designed_Speed_802.11n.pdf 

 

Hope this helps

Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Occasional Contributor II
Posts: 10
Registered: ‎02-06-2012

Re: Phy Type

Thanks Victor.

 

I would still like to know the definition of 802.11b-HT.

MVP
Posts: 4,271
Registered: ‎07-20-2011

Re: Phy Type

 

802.11 b-ht is part of the 802.11n for 2.4 Ghz  but compare to g-ht the device will lower data rates .

 

What devices are you seeing behaving this way ? Are those configure to use bgn or gn ?

Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Occasional Contributor II
Posts: 10
Registered: ‎02-06-2012

Re: Phy Type

[ Edited ]

There are no specific problems that I am trying to resolve, I am only looking at optimizing performance.  This network has a 3200 controller running firmware 6.1.3.3, and managing 32 105 APs.  There are three SSID's, two internal, one guest.  There are typically 175-225 clients.  Clients are very late model devices, including iThings, Androids and Windows7 laptops.

 

Examining realtime statistics yesterday morning, there were 217 clients at that time, and all guest clients were b clients; most were b-HT.  These devices were iThings and Androids; no Windows devices.  There were also iThings on the other SSIDs, but they were a-HT or g-HT.

 

At the moment I am writing this which is about 24 hours later than yesterday when I was looking, there are 176 clients, all are g-HT, ecxcept for two g, and 9 a-HT clients.  There are no b or b-HT.  The guest_vap is set to allow band g only; this has not changed since yesterday.  The options on the 3200 controller are g, a or all.

 

Thanks.

 

 

MVP
Posts: 4,271
Registered: ‎07-20-2011

Re: Phy Type

 

This is a great document if you would like to optimize your 802.11n deployment :

 

http://www.arubanetworks.com/vrd/80211nNetworksVRD/wwhelp/wwhimpl/js/html/wwhelp.htm

 

 

Hope that helps.

Thank you

Victor Fabian
Lead Mobility Engineer @ Integration Partners
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
Occasional Contributor II
Posts: 10
Registered: ‎02-06-2012

Re: Phy Type

Thanks again Victor.  i have not come across this document before and will reference it.

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