Wireless Access

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Contributor I
Posts: 31
Registered: ‎04-18-2012

Radio question?

Hi,

 

I hope this isn't a dumb question, but I guess you should never be afraid to ask them!

 

The sites that we support have AP-105's installed with a 650 controller. The sites generally connect their laptops to the wireless, but these also have different Wireless cards with differing support for 802.11n, 802.11g or 802.11a, some do all, others don't. In a given room any one of these types of radios could be connected to an AP-105 at the same time.

 

Does this mean that because the AP is supporting each radio type, the speed of the connection will be fastest supported by the slowest radio type i.e. if an 802.11n and 802.11g were connected, the fastest theoretical speed achieved would be 54mbps shared? or does the AP keep each radio seperate i.e. the 802.11n would perform at its quickest speed and the same for 802.11g?

 

Hopefully what I said makes sense, if anyone could clear up my understanding of how it works would be appreciated.

 

Cheers

Guru Elite
Posts: 20,801
Registered: ‎03-29-2007

Re: Radio question?


maguire wrote:

Hi,

 

I hope this isn't a dumb question, but I guess you should never be afraid to ask them!

 

The sites that we support have AP-105's installed with a 650 controller. The sites generally connect their laptops to the wireless, but these also have different Wireless cards with differing support for 802.11n, 802.11g or 802.11a, some do all, others don't. In a given room any one of these types of radios could be connected to an AP-105 at the same time.

 

Does this mean that because the AP is supporting each radio type, the speed of the connection will be fastest supported by the slowest radio type i.e. if an 802.11n and 802.11g were connected, the fastest theoretical speed achieved would be 54mbps shared? or does the AP keep each radio seperate i.e. the 802.11n would perform at its quickest speed and the same for 802.11g?

 

Hopefully what I said makes sense, if anyone could clear up my understanding of how it works would be appreciated.

 

Cheers


Each device would be connect at the maximum speed negotiated, but in a shared medium like wireless, faster clients, would have to wait on slower clients transmitting and that would impact throughput for those clients.  The way to deal with this it to enable "fair-access" or "preferred-access" in the QOS profile on the controller.

 



Colin Joseph
Aruba Customer Engineering

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

Contributor I
Posts: 31
Registered: ‎04-18-2012

Re: Radio question?

Thanks for the explanation. I wasn't too sure about the QOS stuff you mentioned, but luckily I have found the VRD fundamental guides that someone else had posted a link too, and they seem to cover most of the basic stuff that I was going to post on the forum, including the QOS policy settings. Cheers
Occasional Contributor II
Posts: 12
Registered: ‎05-20-2012

Re: Radio question?

Can u send me link of this guide , I am kinda new to Aruba .

 

thanks

Guru Elite
Posts: 20,801
Registered: ‎03-29-2007

Re: Radio question?

http://support.arubanetworks.com/DOCUMENTATION/tabid/77/DMXModule/512/Command/Core_Download/Default.aspx?EntryId=5926

 

Search that document for "fair-access"



Colin Joseph
Aruba Customer Engineering

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

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