I have a WLC 4402 with about 45 1010 APs installetion
WLC code version 126.96.36.199 and APs randomly disassociate from WLC - it happens usually one-two times a day
with an errors:
AP's Interface:1(802.11b) Operation State Up: Base Radio MAC:00:0b:85:xx:xx:xx Cause=Unknown
AP's Interface:1(802.11b) Operation State Down: Base Radio MAC:00:0b:85:xx:xx:xx Cause=Max Retrasmission
I've tried the suggested solutions putting a static ARP entry and moving AP's to different VLAN but nothing works unless the AP's physically rebooted.
I think the problem begin just after upgrading to 188.8.131.52
please note when AP's disassociates from WLC its still reachable via ping
Are there any specific requirements for newer versions?