HP Serviceguard A.11.20- Managing Serviceguard Twentieth Edition, August 2011

…
Route Connectivity (no probing was performed):
IPv4:
1 16.89.143.192
16.89.120.0
…
Possible IP Monitor Subnets:
IPv4:
16.89.112.0 Polling Target 16.89.112.1
IPv6:
3ffe:1000:0:a801:: Polling Target 3ffe:1000:0:a801::254
…
The IP Monitor section of the cluster configuration file will look similar to the following for a subnet
on which IP monitoring is configured with target polling.
NOTE: This is the default if cmquerycl detects a gateway for the subnet in question; see SUBNET
under “Cluster Configuration Parameters ” (page 109) for more information.
IMPORTANT: By default, cmquerycl does not verify that the gateways it detects will work
correctly for monitoring. But if you use the -w full option, cmquerycl will validate them as
polling targets.
SUBNET 192.168.1.0
IP_MONITOR ON
POLLING_TARGET 192.168.1.254
To configure a subnet for IP monitoring with peer polling, edit the IP Monitor section of the cluster
configuration file to look similar to this:
SUBNET 192.168.2.0
IP_MONITOR ON
NOTE: This is not the default. If cmquerycl does not detect a gateway for the subnet in question,
it sets IP_MONITOR to OFF, disabling IP-level polling for this subnet; if it does detect a gateway,
it populates POLLING_TARGET, enabling target polling. See SUBNET under “Cluster Configuration
Parameters ” (page 109) for more information.
The IP Monitor section of the cluster configuration file will look similar to the following in the case
of a subnet on which IP monitoring is disabled:
SUBNET 192.168.3.0
IP_MONITOR OFF
NOTE: This is the default if cmquerycl does not detect a gateway for the subnet in question;
it is equivalent to having no SUBNET entry for the subnet. See SUBNET under “Cluster Configuration
Parameters ” (page 109) for more information.
Failure and Recovery Detection Times
With the default NETWORK_POLLING_INTERVAL of 2 seconds (see “Cluster Configuration
Parameters ” (page 109)) the IP monitor will detect IP failures typically within 8–10 seconds for
Ethernet and within 16–18 seconds for InfiniBand. Similarly, with the default
How the Network Manager Works 75