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Aruba
Posts: 1,290
Registered: ‎08-29-2007

Disabling higher data rates in mixed client environment

Hi,

 

I have a mixed client environment, with 802.11n and 802.11a/g clients.  This particular environment is very challenging in terms of RF interference with varying levels of non-wifi interference and multi-path interference.

 

For the 802.11a/g clients I find that sometimes it helps to remove the higher data rates, to minimise the effects of such things as multipath etc.

 

My question is, how would this affect the n clients, apart from them not being able to use those rates?  Are the n rates still all there in that case?  Ideally I want to accomodate all clients without having to create another ssid, so any thoughts appreciated.

 

Thanks


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ACCP, ACMP, ACMX #294
mclarke@arubanetworks.com
Guru Elite
Posts: 21,269
Registered: ‎03-29-2007

Re: Disabling higher data rates in mixed client environment

[ Edited ]

Please download our High Density Validated Reference Design here:  http://www.arubanetworks.com/pdf/technology/DG_HighDensity_VRD.pdf and search for rates to see what is recommended.

 

An excerpt from one of the passages is here:

 

"

  • Disabling Low Rates: By definition, any high-density coverage area has APs and clients in a single room or space. To minimize unnecessary rate adaptation due to higher collision activity, it is a requirement to reduce the number of supported rates. This may be accomplished by just enabling 24-54-Mbps legacy OFDM rates. However, all 802.11n MCS rates must be enabled for compatibility with client device drivers. "


 

 

 



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

Aruba
Posts: 1,290
Registered: ‎08-29-2007

Re: Disabling higher data rates in mixed client environment

Thanks Colin,

 

Wasn't so much concerned with the lower ones.  I wanted to disable the higher rates for the legacy clients.

 

I forgot this command

 

show ap ht-rates bssid <bssid>

 Tested as well.  Chopping off the higher rates in the ssid profile doesn't affect n capable clients and their rates.

 

:smileyhappy:


If my post is helpful please give kudos, or mark as solved if it answers your post.

ACCP, ACMP, ACMX #294
mclarke@arubanetworks.com
Guru Elite
Posts: 21,269
Registered: ‎03-29-2007

Re: Disabling higher data rates in mixed client environment

[ Edited ]

Michael,

 

I spoke to one person in the past who mentioned disabling the higher rates on the assumption that clients would not transmit successfully at those rates, so only allow the lower ones.  It was in a specific situation and I am not sure that provides any real benefit.

 



Colin Joseph
Aruba Customer Engineering

Looking for an Answer? Search the Community Knowledge Base Here: Community Knowledge Base

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