Dell MD3660I Configure Host Access, Understanding Chap Authentication, What Is Chap, Target Chap

d)Save and close the /etc/iscsi/iscsid.conf file.

5.From the console, restart the iSCSI service with the following command: service iscsi start

6.Verify that the iSCSI service is running during boot using the following command from the console: chkconfig iscsi on

7.To display the available iSCSI targets at the specified IP address, use the following command: iscsiadm –m discovery –t st -p <IP_address_of_iSCSI_port>

8.After target discovery, use the following command to manually log in: iscsiadm -m node –l

This log in is performed automatically at startup if automatic startup is enabled.

9.Manually log out of the session using the following command:

iscsiadm -m node -T <initiator_username> -p <target_ip> -u

Step 4: Configure Host Access

This step specifies which host servers access virtual disks on the storage array. You should perform this step:

•Before mapping virtual disks to host servers

•Any time you connect new host servers to the storage array

1.Launch MD Storage Manager.

2.Navigate to the AMW and click Manually define hosts.

3.At Enter host name, enter the host server for virtual disk mapping.

This can be an informal name, not necessarily a name used to identify the host server to the network.

4.Select a method for adding the host port identifier

5.Select the host type.

6.Select whether or not the host server will be part of a host server group that shares access to the same virtual disks as other host servers. Select Yes only if the host is part of a Microsoft cluster.

7.Click Next.

8.Specify if this host will be part of a host group.

9.Click Finish.

Understanding CHAP Authentication

What Is CHAP

Challenge Handshake Authentication Protocol (CHAP) is an optional iSCSI authentication method where the storage array (target) authenticates iSCSI initiators on the host server. Two types of CHAP are supported:

•Target CHAP

•Mutual CHAP

Target CHAP

In target CHAP, the storage array authenticates all requests for access issued by the iSCSI initiator(s) on the host server using a CHAP secret. To set up target CHAP authentication, you must enter a CHAP secret on the storage array, then configure each iSCSI initiator on the host server to send that secret each time it attempts to access the storage array.

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