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Beginner

Multiple Expressway Clusters doing MRA to one Cisco CallManager/IMP Cluster

Very odd request.  Customer needs MRA to Internet as normal spanning over firewalls.  But security is setup so that no workstations can communicate to any other workstation.  So point-to-point traffic such as audio/video, screen share, file transfer, screen capture/paste to chat all fail.  So though is to standup another Expressway C/E cluster internally so all internal workstations would also use MRA allowing all point-to-point traffic to flow through Expressway's instead of trying to go point-to-point.  Can't use same as Internet is using because traffic from external E would have to be allowed through all firewalls to inside clients and also causes series routing/NAT issues (expressway seeing 2000 clients all coming from same NAT IP for example).  Yes a lot of network reworking could resolve these issues, but customer is unwilling to do that.  2nd MRA cluster is quick easy fix.  But does Cisco CUCM and IMP allow 2 different Expressway clusters to do MRA connections?  Any tech details, notes, experience?

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Expressway clustering is

Expressway clustering is allowed with the below prerequisite but I am not sure whether that will solve your issue:

http://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X8-10/Cisco-Expressway-Cluster-Creation-and-Maintenance-Deployment-Guide-X8-10.pdf

HTH

Rajan

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Beginner

We are needing 2 different

We are needing 2 different Expressway clusters.  Each doing MRA to one Cisco Cluster.  That is the key to the question.  Can 2 different Expressway clusters both do MRA to one Cisco UC Cluster.

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