Enabling maintenance mode
Maintenance mode is typically used when you need to upgrade or take out of service a VCS peer that is part
of a cluster. It allows the other cluster peers to continue to operate normally while the peer that is in
maintenance mode is upgraded or serviced.
Putting a peer into maintenance mode provides a controlled method of stopping any further registrations or
calls from being managed by that peer:
n Standard VCS sessions:
l New calls and registrations will be handled by another peer in the cluster.
l Existing registrations are allowed to expire and they then should re-register to another peer (see VCS
Cluster Creation and Maintenance Deployment Guide for more information about endpoint configuration
and setting up DNS SRV records).
l Existing calls will continue until the call is terminated. If necessary, you can manually remove any calls
on this peer that do not clear automatically by going to Status > Calls, selecting the check box next to
the calls you want to terminate and clicking Disconnect (note that SIP calls may not disconnect
immediately).
n Unified CM mobile and remote access sessions:
l Any existing calls passing through that VCS will be dropped.
l Jabber clients will failover automatically and re-register through another peer in the cluster.
l Clients running TC software will not failover automatically will have to be restarted.
To maintain capacity, we recommend that you only enable maintenance mode on one peer at a time.
To enable maintenance mode:
1. Log in the relevant peer.
2. Go to the Maintenance mode page (Maintenance > Maintenance mode).
3. Set Maintenance mode to On.
4. Click Save and click OK on the confirmation dialog.
Note that:
n An alarm is raised while the peer is in maintenance mode.
n You can monitor the Resource usage page (Status > System > Resource usage) to check how many
registrations and calls are currently being handled by that peer.
n Maintenance mode is automatically disabled if the peer is restarted.
Cisco VCS Administrator Guide (X8.1.1) Page 277 of 507
Maintenance
Enabling maintenance mode
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