I have 2 WLC 5508. SSID configurations are same.Now consider the WLC's are restarted for a maintenance activity. After restart SSID was not active on WLC1(Primary) and all AP's were on Primary. Now is there a way to get an alert if an SSID which is enabled doesn't gets enabled after a restart and an alert is send.
Now what i don't know is whether the SSID was really enabled(on the start-up config) before shutting down the WLC. if so why it wasn't enabled after restart.
Now if it was really enabled but config saved(Start-up) had SSID as disabled.
There is no way to get alerts for this.... I would assume that the WLAN was indeed disabled in the start-up config as the enable was not saved. I have not seen this in any code version I have used or tested, so that is why I'm saying that its most likely your configuration was not saved. If you are using AP Groups, it can also be that, but I really don't think so, if all you had to do was enable the WLAN.
If an AP fails over to another WLC, that AP looks for the same AP Group name. If the AP Group is missing or the name is wrong, the AP will be placed in the default-group. So when the AP moves back, it will move to the default group and not the original AP Group it use to be on. I don't think that is the issue though or else you would of noticed that. SNMP for disable WLAN's.... I really don't think there is one.