Adding a Network Interface

Adding a network interface requires unconfiguring and reconfiguring all logical hosts associated with the interface. Note that all data services will be inaccessible for a short period of time during the procedure.

How to Add a Network Interface

On each node that will receive a new network interface card, perform the following steps.

1. Stop the cluster software.

   phys-hahost# scadmin stopnode

2. Add the new interface card, using the instructions included with the card.

3. Configure the new network interface on each node.

   This step is necessary only if the new interface will be part of a logical host. Skip this step if your configuration does not include logical hosts.

   phys-hahost# pnmset

   For Ethernet, create a new /etc/hostname.if file for each new interface on each node, and run the ifconfig(1M) command as you normally would in a non-cluster environment.

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   Note -

   When you configure a set of network interfaces to be used by different logical hosts within a cluster, you must connect all interfaces in the set to the same subnet.

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4. Start the cluster software.

   If all nodes have been stopped, run the scadmin startcluster command on node 0 and then the scadmin startnode command on all other nodes. If at least one node has not had the cluster software stopped, run the scadmin startnode command on the remaining nodes.

   phys-hahost# scadmin startnode

   If the new interfaces are being added to already existing backup groups, the procedure is complete.

   If you modified the backup group configuration, you must bring the cluster back into normal operation and reconfigure each logical host that will be using the new set of network controllers. You will unconfigure and reconfigure each logical host, so run the scconf -p command to print out the current configuration before starting these steps. You can run the scconf -p command on any node that is an active cluster member; it does not need to be run on all cluster nodes.

   To unconfigure and reconfigure the logical host, you can use either the scconf(1M) command as shown in these examples, or the scinstall(1M) command as described in "Adding and Removing Cluster Nodes".

5. Notify users that data services on the affected logical hosts will be unavailable for a short period.

6. Save copies of the /etc/opt/SUNWcluster/conf/ccd.database files on each node, in case you need to restore the original configuration.

7. Turn off the data services.

   phys-hahost# hareg -n dataservice

8. Unregister the data services.

   phys-hahost# hareg -u dataservice

9. Remove the logical host from the cluster.

   Run this command on any node that is an active cluster member. You do not need to run this command on all cluster nodes.

   phys-hahost# scconf clustername -L logicalhost -r

10. Reconfigure the logical host to include the new interface.

    Run this command on any node that is an active cluster member. You do not need to run this command on all cluster nodes.

    phys-hahost# scconf clustername -L logicalhost -n nodelist -g dglist -i logaddrinfo

    The logaddrinfo field is where you define the new interface name. Refer to the listing taken from the scconf -p command output to reconstruct each logical host.

11. Register the data services.

    phys-hahost# hareg [-s] -r dataservice

12. Turn on the data services.

    phys-hahost# hareg -y dataservice

13. Check access to the data services.

14. Notify users that the data services are once again available.

This completes the process of adding a network interface.