Firstly, I would like to confirm my understanding of gatekeeper redundancy, as the documentation is a bit confusing....
A) to provide a redundant gatekeeper from an 'endpoint-to-gatekeeper' perspective - ie H323 gateway, or CUCM cluster, this can only be done by
1) - using HSRP address on the gatekeepers
2) - using a multicast registration address
B) to provide 'redundnant gatekeeper' in a 'gatekeeper-to-gatekeeper' perspective - can be done by:
1) using H323 zone support - ie blast / seq config
2) using Zone Cluster configuration
Can someone let me know if I'm on the right track here?
Lastly, what I really want to do is have a Gatekeeper controlled Intercluster Trunk, between 3 CUCM clusters, using 2 gatekeepers for redundancy - ie each gatekeeper should be capable of doing the job on its own. As the gatekeepers are in different locations, HSRP and Multicast are not options. I am thinking that the only way to achieve this to create 2 trunks, 1 to each gatekeeper, and use a Route Group / Route List to achieve redundancy, and possibly load balancing.