Cisco Cisco TelePresence Video Communication Server Expressway

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Introduction 
Introduction 
Cisco TelePresence Video Communication Server (Cisco VCS) clusters are designed to extend the 
resilience and capacity of a Cisco VCS installation. Cisco VCSs in the cluster share bandwidth usage, 
routing, zone, FindMe™ and other configuration among themselves.  Endpoints can register to any of 
the Cisco VCSs in the cluster; if they lose connection to their initial peer, they can re-register to 
another peer in the cluster. 
Call licensing is carried out on a per-VCS peer basis, and so enough call licenses must be applied to 
each peer to support the number of calls that are needed on that peer, plus any additional calls that 
may be required when one or more other peers become inaccessible. The same number of licenses 
must be applied to each peer in the cluster. 
Every Cisco VCS peer in the cluster must have the same routing capabilities — if any Cisco VCS can 
route a call to a destination it is assumed that all peers in that cluster can route the call to that 
destination. If the routing is different on different Cisco VCSs, then separate Cisco VCSs / Cisco VCS 
clusters must be used. 
This deployment guide describes how to create, modify and upgrade to X5 Cisco VCS clusters. It 
provides information on how to: 
 
upgrade an X1 Cisco VCS or X2 Cisco VCS set of Alternates to a Cisco VCS X5 cluster 
 
upgrade a Cisco VCS X3 / X4 cluster to a Cisco VCS X5 cluster 
 
upgrade a Cisco VCS X5 cluster to a Cisco VCS X5.2 cluster 
 
create a new cluster of Cisco VCS X5 peers 
 
add an X5 Cisco VCS as a new peer to an existing X5 cluster 
 
remove a peer from an X5 cluster 
 
disband an X5 cluster 
 
change the master peer of an X5 Cisco VCS cluster 
 
change the IP address of an X5 cluster peer 
Note: In X3.x the use of Cisco TelePresence Management Suite (Cisco TMS) was essential to the 
correct operation of a Cisco VCS cluster because Cisco TMS was in control of copying configuration 
from the Master Cisco VCS to the non-master peers. 
In X4.1 the Cisco VCS performs the replication of configuration from Master Cisco VCS to non-master  
peers and so use of Cisco TMS was optional for clustering. If provisioning was supported, Cisco TMS 
was needed. 
In X5.x Cisco TMS is involved in initiating the environment for FindMe replication. Although not 
needed to replicate FindMe data throughout the cluster in a running environment, Cisco TMS is 
required to perform the initial distribution of the FindMe data throughout the cluster. Cisco TMS is also 
required if provisioning is to be supported on Cisco VCSs. 
 
Note: Enabling provisioning and creating a cluster are two separate processes. If you intend to 
enable provisioning on your cluster, either: 
 
follow the instructions in this guide to create the cluster of Cisco VCSs (without provisioning 
enabled), and then follow the instructions in the Cisco TMS Provisioning Deployment Guide to 
enable provisioning across the cluster, or 
 
follow the instructions in the Cisco TMS Provisioning Deployment Guide to enable provisioning 
on what will be the Master Cisco VCS, and then follow the instructions in this guide to create the 
cluster of Cisco VCSs. 
For creating and modifying clusters that will remain X4 and X3 clusters, see: 
Cisco VCS Deployment Guide: Cluster creation and maintenance (Cisco VCS X5) 
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