To configure the access to an iSCSI target server, we'll need following setup in place:

Discoverable IP address of the iSCSI target server and the port number to use.
CHAP authentication details (if any).
The iSCSI array should be configured to allow access to the iSCSI initiator. You will need the iSCSI adapter IQN handy for this activity.
The iSCSI array has to be configured to allow the necessary LUNs to be discovered.