I have 1 Central manager WAE,1 Core Wae and 1 edge wae. the core wae does register with CM manager. they are separated with layer 2 switch each in different vlan. however the edge way is unable to register with CM, it is saying cms FAILED "CM is too busy" the CM and the edge wae are separated by WAN link running OSPF, there is ICMP reachability. but the edge wae is unable to register. I restored to factory default and i rewrite the configuration the same problem persist? any advise?
I am thinking of upgrading the IOS starting from CM is there any step by step document of that??
thanks for your help