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

bmennenga
Level 1
Level 1

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?

2 Replies 2

Rajan
VIP Alumni
VIP Alumni

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

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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