6–Boot from SAN Configuration
iSCSI Boot from SAN
79
BC0154501-00 P
Configuring the DHCP Server
Configure the DHCP server to support either Option 16, 17, or 43.
Configuring DHCP iSCSI Boot for IPv6
The DHCPv6 server can provide several options, including stateless or stateful IP
configuration, as well as information for the DHCPv6 client. For iSCSI boot,
Cavium QLogic adapters support the following DHCP configurations:
DHCPv6 Option 16, Vendor Class Option
DHCPv6 Option 17, Vendor-Specific Information
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 QLGC ISAN, as shown in the
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 sub-options are
provided that assign the initiator IQN to the iSCSI boot client, along with two iSCSI
target IQNs that can be used for booting.
NOTE
The format of DHCPv6 Option 16 and Option 17 are fully defined in
RFC 3315.
If you use Option 43, you must also configure Option 60. The value of Option
60 must match the DHCP Vendor ID value, QLGC ISAN, as shown in the
iSCSI General Parameters
of the iSCSI Boot Configuration page.
NOTE
The DHCPv6 standard Root Path option is not yet available. Cavium
suggests using Option 16 or Option 17 for dynamic iSCSI boot IPv6 support.