We have been running two 5508 WLCs in HA mode for a while now connecting 25 2602 APs. We disconnected the heartbeat utp cbale to change the positision of the standby WLC in the rack. We did not power it off. After we plugged back the Heartbeat cable the standby WLC goes into a reboot loop and gives the following error message
Error:Unable to add Licenses on secondary Controller
Now I did not try to reboot the primary one as users are connected and am afraid I will have two WLCs down instead of one. From what I have been reading it seemed that several HA issues were resolved in code 126.96.36.199...
I hope there is simple fix/workaround for this situation.
As per your query i can suggest you the following solution -
This document provides information on the theory of operation and configuration for the Cisco Unified Wireless LAN Controller (WLC) as it pertains to supporting stateful switchover of access points (AP SSO).
The new High Availability (HA) feature (that is, AP SSO) set within the Cisco Unified Wireless Network software release version 7.3 allows the access point (AP) to establish a CAPWAP tunnel with the Active WLC and share a mirror copy of the AP database with the Standby WLC. The APs do not go into the Discovery state when the Active WLC fails and the Standby WLC takes over the network as the Active WLC.
There is only one CAPWAP tunnel maintained at a time between the APs and the WLC that is in an Active state. The overall goal for the addition of AP SSO support to the Cisco Unified Wireless LAN was to reduce major downtime in wireless networks due to failure conditions that may occur due to box failover or network failover.
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
This is the start of a display filter cross reference between Wireshark
and OmniPeek. The 1st installment is a table of advanced filters. More
filters will be added as time allows. It is a living doc, so check back
for changes every so often Please feel f...