The server name (the host name of the system as output by a command such as hostname) must be the same as the host name corresponding to the NIC connected to the public LAN.
If it is different, set the host name that was set in the network file in "5.6 Host Name Settings".
/etc/sysconfig/network
Set the setting name in the HOSTNAME parameter.
Example
Confirm the server name of the primary master server.
# hostname <Enter> master1
Edit the network file to change the server name.
NETWORKING=yes HOSTNAME=master1
Information
If an existing server is to be used as a collaboration server, the server name does not need to match the host name corresponding to the NIC connected to the public LAN.