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Re: [91attendees] Wireless issues with Intel Centrino cards and the IETF APs

Chris Elliott <chelliot@pobox.com> Tue, 11 November 2014 00:10 UTC

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From: Chris Elliott <chelliot@pobox.com>
Date: Mon, 10 Nov 2014 14:10:09 -1000
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To: Chris Elliott <chelliot@pobox.com>
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Subject: Re: [91attendees] Wireless issues with Intel Centrino cards and the IETF APs
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Edit: Added the end of the last sentence, below:

On Mon, Nov 10, 2014 at 1:54 PM, Chris Elliott <chelliot@pobox.com> wrote:

> All,
>
> If you are having issues using the IETF wireless networks, but it works if
> you use the ietf-hotel, ietf-public, or ietf-public-a SSIDs, please read
> further.
>
> Please try using the new SSID called "ietf-2.4only". This may solve your
> problem.
>
> If you continue to have problems please report this either by opening a
> ticket or visiting the help desk in the terminal room. See
> https://tickets.meeting.ietf.org/ and
> https://tickets.meeting.ietf.org/wiki/IETF91network for more information
> on getting help.
>
> Details:
>
> We have identified a compatibility issue with the Cisco APs and certain
> wireless cards. At this point, all clients affected have been using Intel
> Centrino 6xxx AGN cards (where xxx is 200,300,310, and possibly others),
> and a Cisco bug ID we've found seems to confirm this.
>
> The bug is fixed in some Cisco images and APs, but it does not appear to
> be fixed for the APs we are using here, or we have a new bug. We are
> actively working on this issue with Cisco and hope to get a fix soon.
>
> In the meantime, we have implemented a workaround. We have disabled WMM
> (Wi-Fi Multimedia) on the 2.4Ghz radio only. We have done this only on this
> radio, and not on the 5Ghz radio as disabling this extension disables
> 802.11n and 802.11ac data rates, and disables MIMO multiple simultaneous
> streams, and will result in lower performance.
>
> We have also implemented a new SSID, called "ietf-2.4only" that will allow
> clients to select the 2.4Ghz radio.
>
> Clients can also disable the 802.11n and ac data rates on their client
> card and they
>

should be able to use any of our SSIDs on any radio.


>
> Enjoy!
> Chris.
>
>
> --
> Chris Elliott
> chelliot@pobox.com
>



-- 
Chris Elliott
chelliot@pobox.com

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