Migrated an existing site and mgcp GW from a 4.2 cluster to a 6.1.2 cluster. There are 2 gateways, both CMM blades running 12.4 (12). The GW with the issue shows Domain name unresolvable and then the host name of the call manager when you do a show ccm-manager, it does this for primary and both backups and says active call manager: NONE
However, this GW does show registered in call manager and calls are going through the 2 E1's just fine.
The hostname and domain are correct and the dns server settings on this GW are correct. The mgcp version defined is 0.1
If I change the redundant-host setting from hostnames to ip addresses, then the GW shows registered on the CMM blade but shows unregistered in the call manager and calls fail. I tried reloading the blade but nothing changed.
There is a second mgcp CMM GW that is currently using IP Addresses and does show registered on both the CMM and in the call manager, same mgcp version, same IOS.
Any ideas what to look at?