CUCM cluster deployment

[rockym]

Hi,

we currently have a CUCM cluster V11.5 of 5 nodes serving about 3000 devices across the Australia with centralized CUBE for outgoing calls . our next set of offices are in new Zealand and expect to have around 1000 devices. round trip expected between the country is 80-90ms. could anyone suggest me the best deployment plan?

i have seen that the suggested round trip between nodes in the same cluster is 80ms would it be possible to install only a subscriber in the new location as part of the same cluster? or is it better to have a separate cluster?

since the new sites are in a separate country we would need to have separate CUBE for outbound calls.

appreciate any help in suggesting the correct design and also some document to help with the implementation.

thanks,

[Jonathan Schulenberg]

The most recent version of CUCM still caps RTT between nodes at 80ms. Unless you can guarantee that it will be below that threshold you should not stretch the cluster. Also consider the intra-cluster bandwidth requirement starts at 3mb and grows as BHCA or cluster node count increases.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/models.html

Yes, the new country needs a PSTN gateway. I think the design question you need to sort out is whether SRST is sufficient. IF the answer yes, CUBE and SRST can now coexist if you wrap CUBE inside a multitenent config.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/voi-cube-multi-tenants.html

If not, I believe you should look at a new cluster and ILS to stitch the two together.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab12/collab12/dialplan.html#17464

[rockym]

Appreciate your support mate.. i will run thru the docs