Troubleshooting Cluster Replication Problems - Cisco TelePresence Administrator's Manual

Troubleshooting cluster replication problems

Cluster replication can fail for a variety of reasons. The most common problems are listed below, followed by
instructions for resolving the problem:
Some peers have a different master peer defined
1. For each peer in the cluster, go to the
2. Ensure each peer identifies the same Configuration master.
Cluster configuration script has not been run against each peer
1. For each peer in the cluster, go to the
2. Enter the address of each of peer into the Peer IP address fields and configure the Configuration
master. Ensure each peer identifies the same Configuration master peer.
3. Log in to each peer as root (by default you can only do this using a serial connection or SSH) and run the
cluster configuration script. Full details on running this script and configuring clusters is available in
Cluster creation and maintenance deployment
Note that cluster replication alarms can appear briefly while the cluster is initially being set up. These alarms
are removed after the data has completed synchronizing and the cluster has stabilized. This takes
approximately 3 minutes.
Unable to reach the cluster configuration master peer
The VCS operating as the master peer could be unreachable for many reasons, including:
network access problems
n
VCS unit is powered down
n
incorrectly configured IP addresses
n
incorrectly configured IPsec keys - ensure each peer is configured with the same Cluster pre-shared key
n
value
different software versions
n
"Manual synchronization of configuration is required" alarms are raised on peer VCSs
1. Log in to the peer as admin through the CLI (available by default over SSH and through the serial port).
2. Type xCommand ForceConfigUpdate.
This will delete the non-master VCS configuration and force it to update its configuration from the master
VCS.
CAUTION: never issue this command on the master VCS, otherwise all configuration for the cluster will be
lost.
Cisco VCS Administrator Guide (X7.1)
VCS configuration > Clustering
VCS configuration > Clustering
guide.
Clustering and peers
page.
page.
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VCS