Cisco Cisco TelePresence Video Communication Server Expressway
Appendix 3: Connecting Unified CM to a VCS Cluster
From Unified CM version 8.5, to connect Unified CM with a cluster of VCS peers there are 2 methods of providing
Unified CM with the addresses of the VCS cluster peers:
Unified CM with the addresses of the VCS cluster peers:
■
the trunk to VCS specifies the DNS SRV address for the VCS cluster
■
the trunk to VCS specifies a list of VCS peers
Prior to Unified CM 8.5, the trunk to VCS had to specify the DNS SRV address for the VCS cluster.
Configuring the Trunk to VCS to Specify the DNS SRV Address for the VCS Cluster
Ensure that in the DNS server used by Unified CM a DNS SRV record exists for the cluster of VCS peers; in the DNS
SRV record each peer should be set with equal priority and equal weight.
SRV record each peer should be set with equal priority and equal weight.
1.
On Unified CM, go to Device > Trunk.
2.
Select the previously configured Trunk.
3.
Scroll down and configure the SIP Information section fields as follows:
Destination address
<DNS SRV name of VCS cluster>
Destination address is an SRV
Select this check box.
4.
Click Save.
5.
Click Reset.
6.
Click Reset.
7.
On VCS, ensure that the cluster name is configured as a SIP domain (Configuration > Domains).
Configuring the Trunk to VCS to Specify a List of VCS Peers
1.
On Unified CM, go to Device > Trunk.
2.
Select the previously configured Trunk.
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Cisco VCS SIP Trunk to Unified CM Deployment Guide