To begin an iSCSI boot process, a network adapter on your host must have a specially configured iSCSI boot firmware. When you configure the firmware, you specify the networking and iSCSI parameters and enable the adapter for the iSCSI boot.
Configuration on the network adapter can be dynamic or static. If you use the dynamic configuration, you indicate that all target and initiator boot parameters are acquired using DHCP. For the static configuration, you manually enter data that includes your host's IP address and initiator IQN, and the target parameters.
Because configuring the network adapter is vendor specific, review your vendor documentation for instructions.