Dell Emulex Family of Adapters - Manual (Page 970)

Emulex Drivers Version 10.2 for Linux User Manual P010081-01A Rev. A
Appendix B. Configuring iSCSI Through DHCP
IP Address Reservation
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Appendix B. Configuring iSCSI Through DHCP
IP Address Reservation
If you are using the Dynamic Host Configuration Protocol (DHCP) server to obtain an
IP address for your iSCSI initiator, Emulex recommends that you set up a reservation.
A reservation assigns a specific IP address based on the MAC address of your iSCSI
function.
If you do not reserve an IP address through DHCP, you must set the lease length for the
iSCSI initiator’s IP address to unlimited. This allows the IP address lease not to expire.
DHCP Option 43 (Vendor-Specific Information)
This section describes the format for the data returned in DHCP option 43. The method
and format for specifying the Vendor ID is outside the scope of this document and is
not included here. The initiator offers this Vendor ID to the DHCP server to retrieve
data in the format as described in “DHCP Option 43 Format” on page 971.
DHCP Option 43 Parameter Descriptions
Table B-1 describes the parameters used in the format (data string) for option 43.
Table B-1 DHCP Option 43 (Vendor-Specific Information)
Parameter Description Field Type
<TargetIP> Replace with a valid IPv4 address in dotted decimal notation. Mandatory
<TargetTCPPort> Replace with a decimal number ranging from 1 to 65535
(inclusive). The default TCP port (3260) is assumed, if a value is
not specified. Optional
<LUN> A hexadecimal representation of the Logical Unit Number of the
boot device. Replace with an eight-byte number that should be
specified as a hexadecimal number consisting of 16 digits, with an
appropriate number of zeros padded to the left, if required.
If a value is not provided, LUN 0 is assumed to be the boot LUN. Optional
<TargetName> Replace with a valid target iSCSI Qualified Name (IQN) name of up
to 223 characters. Mandatory
<InitiatorName> Replace with a valid initiator IQN of up to 223 characters.
If a value is not provided, the default initiator name (generated
by the OneConnect adapter based on the board’s MAC address) is
used. Optional
<HeaderDigest> Replace with either “E” or “D”.
• “E” denotes that the header digest is enabled.
• “D” denotes that the header digest is disabled. Optional