We are seeing Weird issue at Customer site . 7210 is the Master controller and few 7210 local controllers are working fine. in 6.5.1.10
Customer added one more 7210 Controller at Remote site. when ever customer adds a new AP or AP's on the remote site we all the 900 odd AP's going down on the Master Controller and all AP's are coming back with 5 to 6 minutes .
Licensing is centralized and have sufficient licenses
AP's remote site and AP's on other local controllers are different subnet and Vlan for sure.
what are all the Possible reasons may be causing this, as issue seems quite Weird for me.