PRIMECLUSTER Installation and Administration Guide 4.2 (Linux for Itanium)

8.2 Changing an IP Address on the Public LAN

This section explains how to change the IP address setting if the IP address of a public LAN or administrative LAN changes after the PRIMECLUSTER system is installed. Note that when you change an IP address, do not change the host name.

Operation Procedure:

1. Execute the following command on one of the cluster nodes to stop RMS operation:

   # hvshut -a

2. Execute the following commands on all nodes to start the system in single-user mode.

   # /sbin/shutdown now

3. Mount the local file system on all nodes.

   (Example)

   /bin/mount -a -t ext3

4. Edit the "/etc/hosts" file, and change the IP address on each node.

    

5. Change the IP address of the public LAN.

   (Example)

   /usr/sbin/netconfig --ip=10.20.30.40 --netmask=255.255.255.0 -d eth0

6. If the IP address of the public LAN is set to the shutdown daemon, correct the "/etc/opt/SMAW/SMAWsf/rcsd.cfg" file on each node.

   

   For details, see "Setting Up the Shutdown Facility."

7. On each node, change the IP address of the public LAN used by Web-Based Admin View.

   

   For details, see "7.1 Network address," "7.3 Management server," and "7.5 Multi-network between server and client by classified use" in the "PRIMECLUSTER Web-Based Admin View Operation Guide."

8. If a takeover IP address must be changed (when the takeover IP address is changed after installation, or when the takeover IP address is changed due to transfer of the node), correct the IP address being used as the takeover IP address in the "/etc/hosts" file of each node.

    

9. If a Gls resource is created, edit the "/opt/SMAW/SMAWRrms/bin/hvenv.local" file of each cluster node as shown below so that RMS does not start automatically when the node is rebooted.

   # vi /opt/SMAW/SMAWRrms/bin/hvenv.local <Return>

   export HV_RCSTART=0

10. Restart the system on all nodes.

    # /sbin/shutdown -r now

11. If the takeover IP address is defined by GLS, see "3.4 Changing system setup" in the "PRIMECLUSTER Global Link Services Configuration and Administration Guide : Redundant Line Control Function."

     

12. If you edited the "/opt/SMAW/SMAWRrms/bin/hvenv.local" file in Step 9, return the file to its previous setting.

If a takeover IP address has been defined by GLS and if the takeover IP address is specified directly with an IP address value, not a host name, in the GLS environment settings and the Gls resource settings, first delete the Gls resource. Then change /etc/hosts and the GLS environment settings, and re-register the Gls resource.
For details, see "GLS Setup," "Setting Up Gls Resources," and "5.4 Deleting configuration for Cluster System" in the "PRIMECLUSTER Global Link Services Configuration and Administration Guide : Redundant Line Control Function."