Managing Serviceguard Seventeenth Edition, First Reprint December 2009

CONFIGURED_IO_TIMEOUT_EXTENSION The number of microseconds by which to
increase the time Serviceguard waits after
detecting a node failure, so as to ensure that all
pending I/O on the failed node has ceased. This
parameter must be set for extended-distance
clusters using software mirroring across data
centers over links between iFCP switches; it must
be set to the switches' maximum R_A_TOV value.
NOTE:
CONFIGURED_IO_TIMEOUT_EXTENSION
is supported only with iFCP switches that allow
you to get their R_A_TOV value.
Default is 0.
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
158 Planning and Documenting an HA Cluster