Nokia IPSO 4.0 Reference Manual page 238

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The following is an illustration of this process in a three node cluster with nodes A, B, and C, in
which C is the originating node.
1. If the node A restarts successfully and rejoins the cluster, node B restarts.
If node A does not reboot and rejoin the cluster successfully, the cluster reboot process is
halted and the remaining two nodes continue functioning. You should investigate and
resolve the problem that prevented node A from restarting and rejoining the cluster.
2. If node A successfully restarts and rejoins the cluster but node B does not complete the
process, the cluster reboot process stops and nodes A and C continue functioning as a
cluster.
3. If the nodes A and B complete the process, the node C restarts. As soon as it does, one of the
other nodes becomes the originating node and the cluster continues to function.
Note
Your Cluster Voyager session stays active throughout the process of rebooting the cluster.
You can monitor the process by clicking Cluster Safe Reboot Status.
Caution
Do not log out of Cluster Voyager, end your browser session, or otherwise break your
connection with the cluster while a cluster safe reboot is in progress. Doing so causes
the nodes that you are not logged into to leave the cluster. (If you logged into Cluster
Voyager using a cluster IP address, you are logged into the master.) If this occurs,
manually rejoin the systems to the cluster.
You can also reboot all the cluster nodes simultaneously. In this case, your Cluster Voyager
session does not stay active throughout the reboot process. To reboot all the nodes
simultaneously:
1. On the main configuration page in Cluster Voyager, click Reboot, Shut Down System.
2. Click Reboot (do not click Cluster Traffic Safe Reboot).
Removing a Node from a Cluster
If you want to remove a node from a cluster, you must log into the individual node as a system
user.
1. On the Clustering Setup Configuration page, change the cluster state to down.
2. Click Apply.
The node leaves the cluster, but the cluster configuration information is saved.
3. To rejoin the node to the cluster, simply click Join.
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If the node C restarts successfully, it rejoins the cluster.
If the node C does not restart successfully, the other two nodes continue to function as a
cluster.
Nokia Network Voyager for IPSO 4.0 Reference Guide