Friday, October 3, 2014

Fixing high-availability failover condition in Cisco CUP 10.5

When Cisco Unified IM and Presence servers are in a high availability enabled subcluster, the high availability can go into failover / failed over when one of the servers goes down or is rebooted. If this happens, you can't assign any new users to the subcluster without either bringing high availability back up, or disabling high availability for the server that is still working.

If you thought that this setting was in the CUP server admin pages, you'd be wrong. As I found here, you have to go into CUCM admin page to change this. It's under System > Presence Redundancy Groups. Click find, click on your subcluster, and Enable High Availability is there as a simple checkbox. Turn HA off and then back on again to get it back into a good state.

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