Managing HP Serviceguard for Linux Ninth Edition, April 2009

Specifying the Address Family for the Heartbeat
To tell Serviceguard to use only IPv4, or only IPv6, addresses for the heartbeat, use the
-h option. For example, to use only IPv6 addresses:
cmquerycl -v -h ipv6 -C $SGCONF/clust1.conf -n ftsys9 -n ftsys10
• -h ipv4 tells Serviceguard to discover and configure only IPv4 subnets. If it does
not find any eligible subnets, the command will fail.
• -h ipv6 tells Serviceguard to discover and configure only IPv6 subnets. If it does
not find any eligible subnets, the command will fail.
• If you don't use the -h option, Serviceguard will choose the best available
configuration to meet minimum requirements, preferring an IPv4 LAN over IPv6
where both are available. The resulting configuration could be IPv4 only, IPv6
only, or a mix of both. You can override Serviceguard's default choices by means
of the HEARTBEAT_IP parameter, discussed under “Cluster Configuration
Parameters ” (page 100); that discussion also spells out the heartbeat requirements.
• The-h and -c options are mutually exclusive.
Full Network Probing
-w full lets you specify full network probing, in which actual connectivity is verified
among all LAN interfaces on all nodes in the cluster, whether or not they are all on the
same subnet.
NOTE: This option must be used to discover actual or potential nodes and subnets
in a cross-subnet configuration. See “Obtaining Cross-Subnet Information” (page 173).
It will also validate IP Monitor polling targets; see “Monitoring LAN Interfaces and
Detecting Failure: IP Level” (page 78), and POLLING_TARGET under “Cluster
Configuration Parameters ” (page 100).
Specifying a Lock LUN
A cluster lock LUN or quorum server is required for two-node clusters. If you will be
using a lock LUN, be sure to specify the -L lock_lun_device option with the
cmquerycl command. If the name of the device is the same on all nodes, enter the
option before the node names, as in the following example (all on one line):
cmquerycl -v -L /dev/sda1 -n lp01 -n lp02 -C
$SGCONF/lpcluster.conf
If the name of the device is different on the different nodes, specify each device file
following each node name, as in the following example (all on one line):
cmquerycl -v -n node1 -L /dev/sda1 -n node2 -L /dev/sda2 -C
$SGCONF/lpcluster.conf
172 Building an HA Cluster Configuration