Configuring host objects using the CLI

You can use the command-line interface (CLI) to create host objects.

If you are configuring a host object on a Fibre Channel attached host, ensure that you have completed all zone and switch configuration. Also test the configuration to ensure that zoning was created correctly.

If you are configuring a host object on the clustered system (system) that uses iSCSI connections, ensure that you have completed the necessary host-system configurations and have configured the system for iSCSI connections.

At least one WWPN or iSCSI name must be specified.

Use the following steps to create host objects:

Issue the mkhost CLI command to create a logical host object for a Fibre Channel attached host. Assign your worldwide port name (WWPN) for the host bus adapters (HBAs) in the hosts.
This is an example of the CLI command that you can issue to create aFibre Channel attached host:
```
mkhost -name new_name -fcwwpn wwpn_list
```
where new_name is the name of the host and wwpn_list is the WWPN of the HBA.
To create an iSCSI-attached host, issue the following CLI command:
```
mkhost -iscsiname iscsi_name_list
```
where iscsi_name_list specifies one or more iSCSI qualified names (IQNs) of this host. Up to 16 names can be specified, provided that the command-line limit is not reached. Each name should comply with the iSCSI standard, RFD 3720.
To add ports to a Fibre Channel attached host, issue the addhostport CLI command.
For example, issue the following CLI command:
```
addhostport -hbawwpn wwpn_list new_name
```
This command adds another HBA WWPN wwpn_list to the host that was created in step 1.
To add ports to an iSCSI-attached host, issue the addhostport CLI command.
For example, issue the following CLI command:
```
addhostport -iscsiname iscsi_name_listnew_name
```
where iscsi_name_list specifies the comma-separated list of IQNs to add to the host. This command adds an IQN to the host that was created in step 2.
To set the Challenge Handshake Authentication Protocol (CHAP) secret that is used to authenticate the host for iSCSI I/O, issue the chhost CLI command.
This secret is shared between the host and the system. For example, issue the following CLI command:
```
chhost -chapsecret chap_secret
```
where chap_secret is the CHAP secret that is used to authenticate the host for iSCSI I/O. To list the CHAP secret for each host, use the lsiscsiauth command. To clear any previously set CHAP secret for a host, use the chhost -nochapsecret command.

After you have created the host object on the system, you can map volumes to a host.

If you are unable to discover the disk on the host system or if there are fewer paths available for each disk than expected, test the connectivity between your host system and the system. Depending on the connection type to the host, these steps might be different. For iSCSI-attached hosts, test your connectivity between the host and Lenovo Storage V series ports by pinging Lenovo Storage V series from the host. Ensure that the firewall and router settings are configured correctly and validate that the values for the subnet mask and gateway are specified correctly for the Lenovo Storage V series host configuration.

For Fibre Channel attached hosts, ensure that the active switch configuration includes the host zone and check the host-port link status. To verify end-to-end connectivity, you can use the lsfabric CLI command or the View Fabric panel under Service and Maintenance container in the management GUI.