Access point abnormal behaviours during a fallback

mina_raouf — Mon, 05 Jul 2021 15:53:45 GMT

Hi All,

I have access points in 2 sites that are joining a regional primary controller and each ap is a member of a certain ap group

we configured a secondary controller to those APs that is located in another physical location "not in HA pair" and we tried to simulate the failover scenario where the APs will fall over and fall back normally

when we disable the primary controller, all the APs were switched to the backup one but unfortunately the SSIDs was mapped to different VLAN numbers so it didn't work so directly we roll back so all APs could join the primary WLC again till fixing the configuration on the secondary WLC

but was weird that even when they were back to their primary controller ALL APs joined normally but some abnormal behaviors happen as

Site-1: users can't obtain IP add and after a lot of troubleshooting we rebooted the APs and it works fine

site-2: APs joined the primary WLC but in undesired AP groups, so moving them to their desired AP groups makes the APs reboot as well and the problem was solved

so it was clear that AP reboot in all cases solves the problem

Is there any justification for these behaviors when APs reverted back to their original controller? when the AP joined another controller with different configuration parameters like the VLAN number than the initial one, it should get the new configuration or it keeps caching the old one?

Are there any additional actions I could take care of?

Note: both WLC are with the same software version and no flex connect groups are created

Re: Access point abnormal behaviours during a fallback

Flavio Miranda — Wed, 25 Jul 2018 19:53:31 GMT

I had a similar issue in the past. There was a bug on the WLC version but it was 7.x , probably newer version does not have anymore.

What you should do is configure the vlan mapping per group and not per AP. Check the option "Override VLAN on AP".

-If I helped you somehow, please, rate it as useful.-

topic Access point abnormal behaviours during a fallback in Wireless

Access point abnormal behaviours during a fallback

Re: Access point abnormal behaviours during a fallback