Recovering a node and returning it to the system by using the CLI

After a node or an I/O group fails, you can use the command-line interface (CLI) to recover a node and return it to the system.

1. Run the lsnode command to verify that the node is offline.
2. Run the rmnode nodename_or_ID command to remove the old instance of the offline node from the system.
3. Run the lsnodecandidate command to verify that the node is visible on the fabric.
4. Run the addnode command to add the node back into the system. In the following command, wwnn is the worldwide node name, iogroupname_or_ID identifies the I/O group, and nodename is the name of the node.

   addnode -wwnodename wwnn -iogrp iogroupname_or_ID -name nodename

   Note: In a service situation, a node must be added back into a system that uses the original node name. If the partner node in the I/O group was not also deleted, this name is the default name that is used if the -name parameter is not specified.
5. Run the lsnode command to verify that the node is online.