Adding a node to a system

You can add a node to the system by using the CLI or management GUI. A node can be added to the system if the node previously failed and is being replaced with a new node or if a repair action causes the node to be unrecognizable by the system. When you add nodes, ensure that they are added in pairs to create a full I/O group. Adding a node to the system typically increases the capacity of the entire system. Adding spare nodes to a system does not increase the capacity of the system.

You can use either the management GUI or the command-line interface to add a node to the system. Some models might require you to use the front panel to verify that the new node was added correctly.

Before you add a node to a system, you must make sure that the switch zoning is configured such that the node that is being added is in the same zone as all other nodes in the system. If you are replacing a node and the switch is zoned by worldwide port name (WWPN) rather than by switch port, make sure that the switch is configured such that the node that is being added is in the same VSAN or zone.

Note: Use a consistent method (either only the management GUI, or only the CLI) when you add, remove, and re-add nodes. If a node is added by using the CLI and later re-added by using the GUI, it might get a different node name than it originally had.

You can use either the addnode command or the Add Node wizard in the management GUI. To access the Add Node wizard, select Monitoring > System. On the System -- Overview page, select Add Node to start the wizard. Complete the wizard and verify the new node. If Add Node is not displayed, it indicates a potential cabling issue. Check the installation information to ensure that your node was cabled correctly.

To add a node to a system by using the command-line interface, complete these steps:

Enter this command to verify that the node is detected on the network:
```
svcinfo lsnodecandidate
```
If the node is detected on the system the results display information identifying the new node in the system, like the serial number and machine signature. The id parameter displays the WWNN for the node. If the node is not detected, verify cabling to the node.
Enter this command to determine the I/O group where the node must be added:
```
lsiogrp
```
Record the name or ID of the first I/O group that has a node count of zero. You need the name or ID for the next step.
Note: You must do this step for the first node that is added. Do not perform this step for the second node of the pair because it uses the same I/O group number.
Enter this command to add the node to the system:
```
addnode -wwnodename WWNN -iogrp iogrp_name -name new_name_arg -site site_name 
```
Where WWNN is the WWNN of the node, iogrp_name is the name of the I/O group that you want to add the node to and new_name_arg is the name that you want to assign to the node. If you do not specify a new node name, a default name is assigned. Typically, you specify a meaningful node name. The site_name specifies the name of the site location of the new node. This parameter is only required if the topology is a stretched system.
Note: Adding the node might take a considerable amount of time.
Record this information for future reference:
- Serial number.
- Worldwide node name.
- All of the worldwide port names.
- The name or ID of the I/O group