How to Configure CUCM for Connection Between Nodes (through site to site vpn)

[monasir]

Hi All,

Im trying to find out the best approach to connect

One cucm cluster (with one pub/one sub) with 2 other islands  which also have one subscriber

This needs to be done in a site to site vpn configuration.

Also i need to know what the requirements are for making this all possible.

Latency etc etc

[Jaime Valencia]

So, are you asking how to do CoW??

Or simply how to configure a SIP trunk between two clusters?

[VoIP Engineer]

You could configure a pair of expressways, and have those islands connect over the internet, without a VPN.

Most companies I've seen have an MPLS circuit between locations.

The other option is to have a site to site vpn between your main site and each island.  You'll be at the mercy of the internet for latency, etc, but it should work.  200 ms latency is a number I've seen thrown around.  The less latency the better though.

[Dennis Mink]

please share you desired topology and subnetting.