HP Storage Mirroring V5.1 Software - Manual (Page 123)

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Repeat this step for each IP address that is being monitored.
9. Highlight an IP address that you have selected for monitoring and select a Monitor Interval.
This setting identifies the number of seconds between the monitor requests sent from the target
to the source to determine if the source is online. This option is not configurable if your Method
to Monitor for Failover is set to No Monitoring. Repeat this step for each IP address that is
being monitored.
10. Highlight an IP address that you have selected for monitoring and select the Missed Packets.
This setting is the number of monitor replies sent from the source to the target that can be
missed before assuming the source machine has failed. This option is not configurable if your
Method to Monitor for Failover is set to No Monitoring. Repeat this step for each IP address
that is being monitored.
NOTE: To achieve shorter delays before failover, use lower Monitor Interval and Missed
Packets values. This may be necessary for IP addresses on machines, such as a web
server or order processing database, which must remain available and responsive at
all times. Lower values should be used where redundant interfaces and high-speed,
reliable network links are available to prevent the false detection of failure. If the
hardware does not support reliable communications, lower values can lead to
premature failover. To achieve longer delays before failover, choose higher values.
This may be necessary for IP addresses on slower networks or on a server that is not
transaction critical. For example, failover would not be necessary in the case of a
server restart.