Nokia Network Voyager for IPSO 4.0 Reference Guide 239Changing Cluster Interface ConfigurationsIf you want to change the cluster interface configuration of a node—for example, if you want tochange the primary interface—you must log into the node as a system user. You cannot useCluster Voyager or the CCLI.NoteAny time you make a change to the cluster interface configuration, the node leaves andattempts to rejoin the cluster.1. Log into the Voyager on the node as a system user.2. Display the Clustering Setup Configuration page.3. To add an interface to the cluster, click Yes in the Select column.4. To change the primary interface, click a button in the Primary Interface column.You can select only one primary interface for each node, and the interface you select shouldbe on a dedicated internal network. Click Apply and Save.5. To change the cluster IP address for an interface, enter a new IP address in the Cluster IPAddress field for that interface, then click Apply and Save.Deleting a Cluster ConfigurationIf you want to delete all the cluster configuration information and remove a node from a cluster,you must log into the node as a system user. On the Clustering Setup Configuration page, clickDelete.Synchronizing the Time on Cluster NodesYou probably want to keep the times on the cluster nodes synchronized. If you run Check Point’sNGX, be sure to do so to prevent problems with firewall synchronization.To make sure that the time is synchronized on cluster nodes you must: Assign the same time zone to each node Configure NTP so that each node gets its time from the same time serverAssigning the Time ZoneTo conveniently assign the same time zone to each node, follow these steps:1. Log into Cluster Voyager2. Under System Configuration, click Local Time Setup3. Select the appropriate time zone.4. Click Apply.All the cluster nodes are now set to the time zone you specified.