Our customer has moved his access points from the WSIM in 6509E (Version 220.127.116.11) to the Controller WLC5508 (version 18.104.22.168). Since then he has in the area of "Access Points 1242" massive problems with VoWLAN. In the vicinity of 3602 AP, there is no Problem?
They use the following VoIP Environment: Cisco 7921G and 7925G phones, Call-Manager version 22.214.171.12400-9, Phone Load CP7921G-1.4.2-1.4.2 / CP7925G.
In SYSLOG we found the following entries:
# MM-4 PMKCACHE_ADD_FAILED: mm_listen.c: 8216 Failed to create PMK / CCKM cache entry for station 00: c0: af: *********
We found nothing that helped us of the bug notification at:
Error Message %MM-4-PMKCACHE_ADD_FAILED: Failed to create PMK/CCKM cache entry for
station [hex]:[hex]:[hex]:[hex]:[hex]:[hex] with update from controller
Explanation Internal system error
Recommended Action If this message recurs, copy the message exactly as it appears on the console or in the system log. Research and attempt to resolve the issue using the tools and utilities provided at http://www.cisco.com/tac. With some messages, these tools and utilities will supply clarifying information. Search for resolved software issues using the Bug Toolkit at http://tools.cisco.com/Support/BugToolKit/. If you still require assistance, open a case with the Technical Assistance Center via the Internet at http://tools.cisco.com/ServiceRequestTool/create/launch.do, or contact your Cisco technical support representative and provide the representative with the information you have gathered.
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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