Using Serviceguard Extension for RAC, 6th Edition, April 2008

1. Halt the node by using the cmhaltnode command.
2. Shut down the system using /etc/shutdown, then power down the system.
3. Remove the defective LAN card.
4. Install the new LAN 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.
5. Power up the system.
6. 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.)
On-Line Replacement
If your system hardware supports hotswap I/O cards, and if the system is running
HP-UX 11i (B.11.11 or later), you have the option of replacing the defective LAN card
on-line. This will significantly improve the overall availability of the system. To do
this, follow the steps provided in the section “How to On-line Replace (OLR) a PCI
Card Using SAM” in the document Configuring HP-UX for Peripherals. The OLR
procedure also requires that the new card must be exactly the same card type as the
card you removed to avoid improper operation of the network driver. Serviceguard
will automatically recover the LAN card once it has been replaced and reconnected to
the network.
After 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 this.
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:
1. Use the cmgetconf command to obtain a fresh ASCII configuration file, as follows:
# cmgetconf config.ascii
2. 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 cmviewconcl and lanscan commands.
164 Maintenance and Troubleshooting