ISCSI Boot
NetXtreme-E User’s Manual
February 26, 2018 • NetXtreme-E-UG100
Page 55
Using DHCP option 43 requires more configuration than DHCP option 17, but it provides a richer environment
and provides more configuration options. Broadcom recommends that customers use DHCP option 43 when
performing dynamic iSCSI boot configuration.
Configuring the DHCP Server
Configure the DHCP server to support option 17 or option 43.
DHCP iSCSI Boot Configuration for IPv6
The DHCPv6 server can provide a number of options, including stateless or stateful IP configuration, as well s
information to the DHCPv6 client. For iSCSI boot, Broadcom adapters support the following DHCP
configurations:
DHCPv6 Option 16, Vendor Class Option
DHCPv6 Option 16 (vendor class option) must be present and must contain a string that matches the configured
DHCP Vendor ID parameter. The DHCP Vendor ID value is BRCM ISAN, as shown in General Parameters of
the iSCSI Boot Configuration menu.
The content of Option 16 should be <2-byte length> <DHCP Vendor ID>.
DHCPv6 Option 17, Vendor-Specific Information
DHCPv6 Option 17 (vendor-specific information) provides more configuration options to the iSCSI client. In this
configuration, three additional suboptions are provided that assign the initiator IQN to the iSCSI boot client along
with two iSCSI target IQNs that can be used for booting.
The suboptions are listed in
.
Table 33: DHCP Option 43 Suboption Definition
Suboption
Definition
201
First iSCSI target information in the standard root path format
iscsi:"<servername>":"<protocol>":"<port>":"<LUN>":"<targetname>
203
iSCSI initiator IQN
Note:
If Option 43 is used, configure Option 60. The value of Option 60 should match the DHCP
Vendor ID value. The DHCP Vendor ID value is BRCM ISAN, as shown in General Parameters of the
iSCSI Boot Configuration menu.
Note:
The DHCPv6 standard Root Path option is not yet available. Broadcom suggests using Option
16 or Option 17 for dynamic iSCSI Boot IPv6 support.
