I have a client that want to use CUBE to sit between two CUCM clusters because they have overlapping IP address. Has anyone heard of this before or know of a better way to deal with this situation? If someone done this before can they share a sample configuration
Could you give a more detailed description of the exact problem?
Yes you can have a CUBE to sit between 2 clusters but why would you even need a CUBE for this ? Which ip addresses are overlapping ?
You could just have a direct sip trunk between 2 clusters or an ICT between 2 CUCM clusters.
We have a customer with Cluster A and Cluster B going to CUBE then to SME. Because they are using layer 2 MPLS VPN users on Cluster A can potentially use the same network address as Cluster B. So the plan is to put CUBE in the middle to hide the address of Cluster A and Cluster B. So when an IP Phone in Cluster A call IP Phone in Cluster B the RTP stream does not flow from A to B directly but go via the CUBE router. I hope this make sense because I am confused when customer propose such a solution. My also concern is none of the design for SME has SIP Trunk to CUBE. Not sure whether SME to CUBE has any issues?
Here is what you will require:
1) Use NAT config on the cube to hiding addresses ( private / public)
2) By SME I am assuming you are referring to Cisco Unified Communications Manager Session Management Edition. You can have
a topology similar to this to achieve your requirement
cluster>>>sip>>> CUBE >>>>sip>>>SME>>>sip>>>>cluster B
3) Session Mgmt Edition is a sip B2BUA. For sip trunking to be done on the cube you can configure basic "sip dial peers" with your dialplan.
4) Also refer to the following links:
For other deployment/designs:
Also sample configurations are available here:
Hope this Helps!