Dhcp Option 43, Vendor-Specific Information; Configuring The Dhcp Server; Dhcp Iscsi Boot Configuration For Ipv6; Dhcpv6 Option 16, Vendor Class Option - Broadcom NetXtreme-C User Manual

NetXtreme-C/NetXtreme-E User Guide

10.3.1.2 DHCP Option 43, Vendor-Specific Information

DHCP option 43 (vendor-specific information) provides more configuration options to the iSCSI client than DHCP option 17.
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 format for the iSCSI target IQN is the same as that of DHCP option
17, while the iSCSI initiator IQN is simply the initiator's IQN.
NOTE:
DHCP Option 43 is supported on IPv4 only.
The suboptions are listed below.
Table 20: 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
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.

10.3.1.3 Configuring the DHCP Server

Configure the DHCP server to support option 17 or option 43.
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.

10.3.2 DHCP iSCSI Boot Configuration for IPv6

The DHCPv6 server can provide a number of options, including stateless or stateful IP configuration, as well as information
to the DHCPv6 client. For iSCSI boot, Broadcom adapters support the following DHCP configurations:
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.

10.3.2.1 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>.

10.3.2.2 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 21 on page 35.
NetXtreme-UG100
34