Bug ID: CSCup28852
Recent installation of CUCM 10.5 and using the multi-server multi-SAN certificate causes the Callmanager process to send group phone resets every 7 to 10 minutes. The phone symptoms will show ITL updates during this time causing a restart. The phone doesn't do a full reset, only a restart with the ITL update.
I wanted to call some attention to this because this new certificate feature is highlighted as a big change for CUCM certificate management.
The certificate was a full X509v3 with ipsec, client auth, server auth, non-repudiation, and a few other bullet items. The process to install is easy and functional but underneath the system is unhappy.
Thanks! Happy hunting!