Adding a control enclosure to the clustered system by using the CLI

You can use the command-line interface (CLI) to add a control enclosure back into the system after it is either removed or rejected.

Attention: Before you add a control enclosure to a system, configure the switch zoning. The control enclosure to add must be in the same zone as all other control enclosures in the system. You can replace a control enclosure when the switch is zoned by worldwide port name (WWPN) rather than by switch port. To use the same WWPNs, carefully adhere to this service procedure.

To add a control enclosure to a system, complete the following procedure:

Issue this CLI command to list the control enclosure candidates:
```
lscontrolenclosurecandidate
```
This output is an example of what you might see after you run the lscontrolenclosurecandidate command:
```
serial_number product_MTM
G00F7GY       2076-124
```
Issue this CLI command to add the control enclosure:
addcontrolenclosure -iogrp 1 -sernum G00F7GY

The 0 value is the I/O group where you add the control enclosure. The 2361443 value is the serial number for the control enclosure.

Note: In a service situation, add a control enclosure back into a system by using the original control enclosure name. When the partner control enclosure in the I/O group is not deleted, the I/O group name is the default when the -name value is not specified.

The following example output might result:
```
Enclosure containing Node, id [x], successfully added
```
Attention: If more than one candidate control enclosure exists, add it into same I/O group to which it belonged before it was deleted. Failure to do so might result in data corruption. If you are uncertain about which candidate control enclosure belongs to the I/O group, shut down all host systems that access this system before you proceed. Reboot each system after you add all control enclosuresback into the system.
Issue this CLI command to ensure that the node was added successfully:
```
svcinfo lsnodecanister
```
This output is an example of what you might see when you run the lsnodecanister command:

id name   UPS_serial_number WWNN             status  IO_group_id IO_group_name config_node UPS_unique_id    hardware
1  node1  1000877059        5005076801000EAA online  0           io_grp0       yes         20400002071C0149 8G4
2  node2  1000871053        500507680100275D online  0           io_grp0       no          2040000207040143 8G4

All control enclosuresare now online.