Symptom: failed inter-controller roam on wlan mapped to same anchor for 5508 at 18.104.22.168
Conditions:A layer-2 inter-controller roam between two 5508's both mapped to same anchor 5508 all on 22.214.171.124, sometimes do not pass the the achor ip information during the mobility messaging. Due to this, client gets mapped to foreign-1 as mobility peer while on foreign-2 losing its network access. Client entry automatically gets removed form anchor.
Issue not observed on two 4400 foreign WLC mapped to same DMZ 5508 anchor at 126.96.36.199
Workaround:Clearing client entries from both foreign WLC resolves issue and clients perform inter-controller roaming fine for certain period of time and then hit the same state again.
When your client is connected to one AP ..check "sh client detail <mac-address>" to see if it can see any neighbor APs with good signal strength where it can actually roam. Specially the 2nd AP where you are going to roam. There might be coverage hole in between where client doesnt think it can roam. If it is good and still it re-authenticates , then there might be client issue also as why it is sending Association request again. So as others requested "debug client <mac-address>" will give the exact picture.
I hope both the APs are connected to the same WLC.
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
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