If a LAN or fibre channel card fails and the card has to be
replaced, you can replace it on-line or off-line depending on the
type of hardware and operating system you are running. It is not
necessary to bring the cluster down to do this.
Follow these steps to replace an I/O card off-line.
Halt the node by using the cmhaltnode command.
Shut down the system using /usr/sbin/shutdown, then power down the system.
Remove the defective I/O card.
Install the new I/O card. The new card must be exactly
the same card type, and it must be installed in the same slot as
the card you removed.
Power up the system.
If necessary, add the node back into the cluster
by using the cmrunnode command. (You can omit this step if the node is configured
to join the cluster automatically.)
Replacing the Card
After the on-line or off-line replacement of LAN cards has
been done, Serviceguard will detect that the MAC address (LLA) of
the card has changed from the value stored in the cluster binary
configuration file, and it will notify the other nodes in the cluster
of the new MAC address. The cluster will operate normally after
It is also recommended that you update the new MAC address
in the cluster binary configuration file by re-applying the cluster
configuration. Use the following steps for on-line reconfiguration:
Use the cmgetconf command to obtain a fresh ASCII configuration file, as
cmgetconf -c clustername config.ascii
Use the cmapplyconf command to apply the configuration and copy the new binary
file to all cluster nodes:
cmapplyconf -C config.ascii
This procedure updates the binary file with the new MAC address
and thus avoids data inconsistency between the outputs of the cmviewconf and lanscan commands.