Managing Serviceguard 14th Edition, June 2007

Cluster and Package Maintenance
Reconfiguring a Cluster
Chapter 7 355
See page 288 for more information about the package networking
parameters.
• You cannot change the IP configuration of an interface used by the
cluster in a single transaction (cmapplyconf).
You must first delete the NIC from the cluster configuration, then
reconfigure the NIC (using ifconfig (1m), for example), then add
the NIC back into the cluster.
Examples of when you must do this include:
— moving a NIC from one subnet to another
— adding an IP address to a NIC
— removing an IP address from a NIC
Some sample procedures follow.
Example: Adding a Heartbeat LAN Suppose that a subnet
15.13.170.0 is shared by nodes ftsys9 and ftsys10 in a two-node
cluster cluster1, and you want to add it to the cluster configuration as a
heartbeat subnet. Proceed as follows.
Step 1. Run cmquerycl to get a cluster configuration template file that includes
networking information for interfaces that are available to be added to
the cluster configuration:
cmquerycl -c cluster1 -C clconfig.ascii
NOTE As of Serviceguard A.11.18, cmquerycl -c produces output that includes
commented-out entries for interfaces that are not currently part of the
cluster configuration, but are available.
The networking portion of the resulting clconfig.ascii file looks
something like this:
NODE_NAME ftsys9
NETWORK_INTERFACE lan1
HEARTBEAT_IP 192.3.17.18
#NETWORK_INTERFACE lan0