We have recently started testing an implementation of CUCM 6.1 and so far all appears to be working as planned.
The system consists of 2 Communication managers on different subnets each with a gateway in its own subnet one PRI and one BRI.
Our one remaining issue comes during destruction testing. Once we pull the Ethernet cable out of the Primary CM everything appears to re register with the backup CM fine. All inbound calls process as expected but it is impossible to make outbound calls. The system just plays a bussy tone.
The SIP trunks appear to be working ok, but the trunks via the MGCP gateways do not.
Any ideas would be welcome.
You may also need to add this statement:
Most admins will leave this statement OUT of the router so Callmanager will not update the routers configuration by mistake (or and admin on CCM make a mistake and reset the gateway)
When ccm-manager config is in the config, callmanager can push updates to the router (configurations)
Add this in to your router, reboot the router if necessary. Test again.
If you are still having issues, I would assume you may be having replication issues between pub and sub. Check the log files in RTMT for any dbreplication issues.