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
