Wireless Access

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Support Channels - Client and AP

Need some clarification - here's the scenario:

 

APs are operating at standard 5GHz channels for US domain (including 36 and 48). Client device is not configured to support channel 36 or 48, so if client moves to an area that has an AP on one of those channels, I assume the client cannot associate and must either remain on old AP or try to find another, which may have a poor signal to stay connected. Is this correct? I assume this could result in wifi disconnects if other APs are too far away for that client on supported channels.

 

Another question I have is around DFS channels. If we enable DFS for the APs, and some clients do not support those channels, will we cause the same problem?

 

Thanks.



Michael Haring
If my answer is helpful, a Kudos is always appreciated!
Guru Elite

Re: Support Channels - Client and AP

The short answer is yes.


*Answers and views expressed by me on this forum are my own and not necessarily the position of Aruba Networks or Hewlett Packard Enterprise.*
ArubaOS 8.3 User Guide
InstantOS 8.3 User Guide
Airheads Knowledgebase

Re: Channel selection - Client and AP

Yes on both questions (pretty will create a coverage hole for those clients)

You need to design your wireless environment based on the channels the clients can support (RF Domain Profile)

If you are not expecting to see those clients everywhere then you can create two different RF domains profiles (one allowing those channels and one without those channels) and assign those based on the AP-Group
Thank you

Victor Fabian
Lead Mobility Architect @WEI
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA

Re: Channel selection - Client and AP

Perfect, thank you for the help.

 

This was an example of a huge variety of client devices ranging from new to 10 years old and we came across a device that did not have channels 36 and 48 marked as allowed, which had reports of wifi drops. This was one of the improvements made to fix that, but was curious as to the effect beforehand. Sounds like it could have been related.

 

I'm not sure how many end clients actually support DFS channels or what the standard is for manufacturers, but I know it's disabled by default probably for a reason.

 

Thanks.



Michael Haring
If my answer is helpful, a Kudos is always appreciated!
Aruba Employee

Re: Channel selection - Client and AP


@mharingwrote:

I'm not sure how many end clients actually support DFS channels or what the standard is for manufacturers, but I know it's disabled by default probably for a reason.


Always test/verify the actual client capabilies, but overall most clients that support 802.11ac also support at least some of the DFS channels.


Charlie Clemmer
Aruba Customer Engineering

Re: Channel selection - Client and AP

You can use Mike Albano’s list
http://clients.mikealbano.com/home
Thank you

Victor Fabian
Lead Mobility Architect @WEI
AMFX | ACMX | ACDX | ACCX | CWAP | CWDP | CWNA
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