Using Serviceguard Extension for RAC, 7th Edition, September 2008
4. Remove the defective I/O card.
5. Install the new 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.
6. In SAM, select the option to attach the new I/O card.
7. Add the node back into the cluster by using Serviceguard Manager or the cmrunnode
command.
Replacement of LAN Cards
If you have a LAN card failure, which requires the LAN card 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.
Off-Line Replacement
The following steps show how to replace a LAN card off-line. These steps apply to both HP-UX
11i:
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.
126 Maintenance and Troubleshooting