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User Guide NetXtreme II
January 2010
Broadcom Corporation
Document ENGSRVT52-CDUM100-R iSCSI Boot Page 85
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 17, Vendor-Specific Information
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.
DHCPv6 Option 16, Vendor Class Option
DHCPv6 Option 16 (vendor class option) must be present and must contain a string that matches your 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 below.
NOTE: In Table 4, the brackets [ ] are required for the IPv6 addresses.
The content of option 17 should be <2-byte Option Number 201|202|203> <2-byte length> <data>.
Table 4: DHCP Option 17 Suboption Definition
Suboption Definition
201 First iSCSI target information in the standard root path format
"iscsi:"[<servername>]":"<protocol>":"<port>":"<LUN>":"<targetname>"
202 Second iSCSI target information in the standard root path format
"iscsi:"[<servername>]":"<protocol>":"<port>":"<LUN>":"<targetname>"
203 iSCSI initiator IQN