07-14-2010 07:41 AM - edited 07-03-2021 06:58 PM
Running WISMs on 6.0.196 and 4404's on 6.0.196 and seeing many wireless disconnects.
TAC has released to me 6.0.197.10 but still experiencing drops and another unidentified bug that I'm waiting to hear back on.
Anyone running 6.0.196 and seeing the same? Might be downgrading from 6.0.196 to 5.2.193 this weekend.
Kind of at a loss and need to get this resolved.
07-14-2010 07:59 AM
Hi there,
Sadly, many people have run into this issue (check the second listed bug)
Software Advisory
Wireless LAN Controller Software
___________________________________________
Base Code: 6.0.182.0, 6.0.188.0, 6.0.196.0
Special Build: Following options are available:
1. Move to 7.0.98.0 Release posted on CCO. Please note, 7.0 is a new feature release.
2. Contact TAC to get a 6.0 Special or Beta release with fixes for the bugs below.
3. Wait for the CCO release of 6.0 MR3 (Maintenance Release), which is planned for July/August 2010
The code is designed for 2100 / 4400 / 5500 / WiSM / WLC3750 / WLCM
This Software Advisory Notice is issued against all the above Wireless LAN Controller software versions due to the following bugs:
CSCtf34858 Client can't transmit traffic if it reassociates to an AP within 20 sec
CSCte89891 Radio may stop transmitting beacons periodically
http://www.cisco.com/web/software/Wireless/Deferral/Software_Advisory_6_0_196_0.html
Cheers!
Rob
07-14-2010 08:11 AM
Agreed, but our conditions don't match. Maybe it doesn't matter though.
Symptom:
AP may stop transmitting beacons intermittently (maximum for 10 seconds) in a heavy multicast environment. Clients may drop during this period.
Conditions:
This problem will happen only in the presence of the following 3 factors.
1) RRM should be enabled (especially off-channel scanning)
2) Lot of multicast traffic should be present on the network.
3) Presence of power save clients.
Fix:
This issue has been fixed in 7.0 release and H MR3 release. All previous 6.0 releases (and earlier) have the problem.
We are using statically assigned channels and power settings. Also very little multicast traffic.
07-14-2010 08:52 AM
We ran into this bug (or a very similar one) in 6.0.182.0. There was not a lot of multicast, and RRM was enabled (although the power and channels were statically configured). We went to 188 and have not had the problem since. I'm very hesitant to move to one of the newer releases until we get some better feedback, but as of today, we are stable at 188 and have been for 6 months or so.
-John
07-15-2010 06:59 AM
My customer is experiencing similar client drops. However, they are not using RRM or multicast, running WLC code 5.2.193.0. Please share any info that comes available from the yet to be identified bug. They've been experiencing this for the better part of 6 months now.
07-15-2010 07:06 AM
Thanks for the info. I have a WebEx today to look into it further.
My thought was to downgrade to 5.2.193 might have to rethink that now.
I will update the tread with whatever information I can gather.
07-15-2010 07:23 AM
Just found the email with the bug ID we ran into -
I don't know about versions after 6.0.188.0, but we've not run into it since. BTW, we are running older 1231 APs...
John
07-15-2010 11:09 AM
6.0.199 has just been released today (ok, its not on the download site yet) but the release notes are, and has the software advisory bugs as being resolved.
Looks like I may free up a controller this weekend and move just a single building to the new release and test it.
I will post my findings..
07-15-2010 03:29 PM
Why not upgrade to 7.0?
07-19-2010 12:51 AM
With this being a multi-hospital environment I would prefer stability over the new features. I have applied this two one 4404 controller and moved a single offsite practice to it for testing. Only 5 access points but these are the loudest complainers when the wireless network experiences issues.
If this proves to be stable, then I will upgrade our other 4404s and WiSMs in a few weeks.
07-22-2010 11:51 AM
Has anyone moved from 6.0.196 to 6.0.199?
Was it a successful change? Are you still seeing any of the 6.0.196 buggy symptoms?
07-22-2010 11:56 AM
Upgraded one of our controllers and the users haven't had any disconnects or performance issues, yet. So far it looks really good!
08-03-2010 07:17 AM
UPDATE:
If you have Vocera in your environment stay away from 6.0.199
Going from 196 to 199 fixed many issues that we were having but broke Vocera.
What seems to be happening is the keepalive messages that badge sends to the vocera server are getting dropped, the badge goes off net, and it goes into a 'searching for server' state. It may fix itself after 30 sec, 1min, 5min etc... it's very sporadic or a battery pull might work.
Has anybody else seen this?
08-04-2010 07:17 AM
We have this Vocera / 6.0.199 issue narrowed down to inter-controller roaming. The badge only goes into a searching for server state during an inter-controller roam event.
Working with TAC.
08-05-2010 06:21 AM
Ok this has me worried. We too have Vocerra in our emergency department. Any more news on this?
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