Configuring system iSCSI authentication using the CLI

You can use the command-line interface (CLI) to configure the Lenovo Storage V series clustered system to authenticate with iSCSI-attached hosts using the Challenge-Handshake Authentication Protocol (CHAP). After the CHAP is set for the system, all attached hosts must be configured to authenticate. When troubleshooting a problem, you can delay your configuration of the CHAP authentication until after you configure the first one or two hosts and test their connectivity.

1. To configure CHAP authentication for an iSCSI host, enter the following CLI command:

   chhost -chapsecret chap_secrethost_name

   where chap_secret is the CHAP secret to be used to authenticate the system via iSCSI and host_name is the name of the iSCSI host.The chap_secret value must be 12 characters.
2. To set the authentication method for the iSCSI communications of the system, enter the following CLI command:

   chsystem -iscsiauthmethod chap -chapsecret chap_secret

   where chap specifies that CHAP is the authentication method and chap_secret is the CHAP secret to be used. The specified CHAP secret cannot begin or end with a space.
3. To clear all CHAP secrets for iSCSI authentication that have been previously set, enter the following CLI command:

   chsystem -nochapsecret 

   The nochapsecret parameter is not allowed if the chapsecret parameter is specified.
4. Run the lsiscsiauth command to display the Challenge Handshake Authentication Protocol (CHAP) secret that has been configured.