[cisco-voip] 7921G suffering from dropped calls while roaming between AP

[Jason B]

Are you by chance using SR1? I had all kinds of these type problems with
1.3.4SR1 on 7921 and 7925 IP Phones a few months ago. I was advised by TAC
to use 1.3.3 and stay away from 1.3.4SR1 because all the bugs. Based on my
limited and painful experience with 1.3.4, I would recommend going to 1.3.3
unless 1.3.5 has been released. I haven't checked back lately.



The particular I bug I was seeing was CSCti62253



Jason


On Tue, Jan 25, 2011 at 6:04 AM, Ki Wi <kiwi.voice at gmail.com> wrote:

> Hey guys,
> I need a little help here. We have lots of newly provision 7921G in the
> environment running ver 1.3.4. WPA2/AES/LEAP/CCKM turned on. WLC is on
> latest 7.0.98.0. The LAN switches are mostly on 2960S or cat4500 with
> sup6lite.
>
> I have read around but doesn't really find much information on how to
> troubleshoot this issue. I'm aware that 7921G with version older than 1.3.4
> will need to do full reregistration when it roams to the new AP and some
> roaming issues with older sup engine.
>
> My colleague actually troubleshoot this issue and he changed the wireless
> phone to scan for channel 1/6/11 only (on b/g) , we disabled the A as it
> seems like we have a poor coverage with 802.11a. Customer reported that they
> tested with 2 phones (one with new setting , one with existing setting), the
> phone with new setting doesn't suffer any dropped calls at all. I find it
> too amazing to believe so I'm wondering does anyone have similar experience
> before? We have other large sites which doesn't suffer this issue. Honestly,
> I don't think that's going to be the solution as it requires us to drill
> down into low level configuration and manipulate how the phone to scan for
> AP in specific channels.
>
> Cheers,
> Ki Wi
>
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