Managing Serviceguard Eighteenth Edition, September 2010

NOTE: After replacing a Fibre Channel I/O card, it may necessary to reconfigure the
SAN to use the World Wide Name (WWN) of the new Fibre Channel card if Fabric
Zoning or other SAN security requiring WWN is used.
After Replacing the Card
After the online or offline 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 -c clustername 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 cmviewconf and lanscan commands.
Replacing a Failed Quorum Server System
When a Quorum Server (QS) fails or becomes unavailable to the clusters it is providing
quorum services for, this will not cause a failure on any cluster. However, the loss of
the quorum server does increase the vulnerability of the clusters in case there is an
additional failure. Use the following procedure to replace a defective quorum server
system. If you use this procedure, you do not need to change the configuration of any
cluster nodes.
1. Remove the old Quorum Server system from the network.
2. Set up the new system and configure it with the old quorum server’s IP address
and hostname.
3. Install and configure the Quorum Server software on the new system. Be sure to
include in the new QS authorization file (/etc/cmcluster/qs_authfile) all
of the nodes that were configured for the old quorum server. Refer to the qs(1)
manpage for details about configuring the QS authorization file.
4. Start the Quorum Server as follows:
• Edit the /etc/inittab file to add the Quorum Server entries.
• Use the init q command to run the Quorum Server.
See the qs(1) manpage for more details.
408 Troubleshooting Your Cluster