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Cisco Wireless question about client disassociation

clararosa94
Level 1
Level 1

So something I've been noticing a lot when attempting to troubleshoot clients through Prime Infrastructure... a lot of wireless clients seem to disassociate fairly frequently and then immediate associate again... usually to a different AP. The association history in Prime for the client ends up looking like a repeating wave between three APs. The durations between association times usually seem to always be around an a factor of 5 minutes... so 15 min 14 sec, 10 min 14 sec, 25 min 39 sec, 1 hr 10 min 55 sec, etc.

 

I've been wondering what this is about and how it probably affects the end-user experience. My assumption is it is disruptive due to the client having to move between APs... so anything real-time and/or latency sensitive like video chat or online gaming might be affected. I figured at first it may be due to a system default of 5 minutes on the User Session Idle but I adjusted it up to an hour and didn't see a noticeable difference. DCA is currently set on an interval of 10 minutes and I have EDRRM on so it seems like it wouldn't always happen in a factor of 5 between changes.

 

I can see a ton of RRM events for 2.4ghz, so many so that Prime is saying there are to many unique events per device, so I think I may need to tweak 2.4ghz RRM sensitivity down but the clients I'm seeing are also 5ghz which doesn't have nearly as much of an interference or co-channel utilization issue at our location and no where near the number of events.

 

Anyone have any thoughts or experience with this or is this just normal?

2 Replies 2

Rasika Nayanajith
VIP Alumni
VIP Alumni

Are they associate with the same AP or different nearby APs? By looking at client connectivity history, you can tell whether client is roaming or stationary. If it is a roaming scenario, I think that is normal

 

HTH

Rasika

patoberli
VIP Alumni
VIP Alumni

I would lower the DCA options to 1 hour or even more. I've set the DCA RRM sensitivity to low on both frequencies. 

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