If you change the host name of a cluster node, you must change the address from which Sun Cluster Manager runs. The default security certificate is generated based on the node's host name at the time Sun Cluster Manager is installed. To reset the node's host name, delete the certificate file, keystore and restart Sun Cluster Manager. Sun Cluster Manager automatically creates a new certificate file with the new host name. You must complete this procedure on any node that has had its host name changed.