Managing Serviceguard Eighteenth Edition, September 2010

NETWORK_FAILURE_DETECTION The configuration file specifies one of two ways
to decide when a network interface card has
failed:
• INOUT
• INONLY_OR_INOUT
The default is INOUT.
See “Monitoring LAN Interfaces and Detecting
Failure: Link Level” (page 92) for more
information.
Can be changed while the cluster is running.
NETWORK_AUTO_FAILBACK How Serviceguard will handle the recovery of
the primary LAN interface after it has failed over
to the standby interface because of a link level
failure. Valid values are YES and NO. YES means
the IP address(es) will fail back to the primary
LAN interface from the standby when the
primary LAN interface recovers at the link level.
NO means the IP address(es) will fail back to the
primary LAN interface only when you use
cmmodnet (1m) to re-enable the interface.
Default is YES.
SUBNET IP address of a cluster subnet for which IP
Monitoring can be turned on or off (see
IP_MONITOR). The subnet must be configured
into the cluster, via NETWORK_INTERFACE and
either HEARTBEAT_IP or STATIONARY_IP. All
entries for IP_MONITOR and POLLING_TARGET
apply to this subnet until the next SUBNET entry;
SUBNET must be the first of each trio.
By default, each of the cluster subnets is listed
under SUBNET, and, if at least one gateway is
detected for that subnet, IP_MONITOR is set to
ON and POLLING_TARGET entries are populated
with the gateway addresses, enabling target
polling; otherwise the subnet is listed with
IP_MONITOR set to OFF.
See “Monitoring LAN Interfaces and Detecting
Failure: IP Level” (page 98) for more information.
Can be changed while the cluster is running;
must be removed, with its accompanying
164 Planning and Documenting an HA Cluster