Installation guide

Figure 4 .4 . The REDUNDANCY Panel
Redundant server public IP
Enter the public real IP address for the backup LVS router node.
Redundant server private IP
Enter the backup node's private real IP address in this text field.
If you do not see the field called Redundant server private IP, go back to the GLOBAL
SETT INGS panel and enter a Primary server private IP address and click ACCEPT .
The rest of the panel is devoted to configuring the heartbeat channel, which is used by the backup node
to monitor the primary node for failure.
Heartbeat Interval (seconds)
This field sets the number of seconds between heartbeats — the interval that the backup node
will check the functional status of the primary LVS node.
Assum e dead after (seconds)
If the primary LVS node does not respond after this number of seconds, then the backup LVS
router node will initiate failover.
Heartbeat runs on port
This field sets the port at which the heartbeat communicates with the primary LVS node. T he
default is set to 539 if this field is left blank.
Red Hat Enterprise Linux 4 Virtual Server Administration
4 0