Managing Serviceguard Eighteenth Edition, September 2010

IP_MONITOR and POLLING_TARGET entries,
if the subnet in question is removed from the
cluster configuration.
IP_MONITOR Specifies whether or not the subnet specified in
the preceding SUBNET entry will be monitored
at the IP layer.
To enable IP monitoring for the subnet, set
IP_MONITOR to ON; to disable it, set it to OFF.
By default IP_MONITOR is set to ON if a gateway
is detected for the SUBNET in question, and
POLLING_TARGET entries are populated with
the gateway addresses, enabling target polling.
See the POLLING_TARGET description that
follows for more information.
HP recommends you use target polling because
it enables monitoring beyond the first level of
switches, but if you want to use peer polling
instead, set IP_MONITOR to ON for this SUBNET,
but do not use POLLING_TARGET (comment
out or delete any POLLING_TARGET entries that
are already there).
If a network interface in this subnet fails at the
IP level and IP_MONITOR is set toON, the
interface will be marked down. If it is set to OFF,
failures that occur only at the IP-level will not be
detected.
Can be changed while the cluster is running;
must be removed if the preceding SUBNET entry
is removed.
POLLING_TARGET The IP address to which polling messages will
be sent from all network interfaces on the subnet
specified in the preceding SUBNET entry, if
IP_MONITOR is set to ON. This is called target
polling.
Each subnet can have multiple polling targets;
repeat POLLING_TARGET entries as needed.
If IP_MONITOR is set to ON, but no
POLLING_TARGET is specified, polling messages
are sent between network interfaces on the same
subnet (peer polling). HP recommends you use
Cluster Configuration Planning 165