Problem Summary: The Sun Cluster for HA for Oracle data service uses the su command to start and stop the database. If you are running Solaris 8 or Solaris 9, the network service might become unavailable when a cluster node's public network fails.
Workaround: Include the following entries in the /etc/nsswitch.conf file on each node that can be the primary for oracle_server resource or oracle_listener resource:
passwd: files groups: files publickey: files project: files
These entries ensure that the su command does not refer to the NIS/NIS+ name services, so that the data service starts and stops correctly during a network failure.