NetXtreme-UG100
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NetXtreme-C/NetXtreme-E
User Guide
10.3 Configuring the DHCP Server to Support iSCSI Boot
The DHCP server is an optional component and it is only necessary for dynamic iSCSI Boot configuration setup (see
“Dynamic iSCSI Boot Configuration” on page 31
).
Configuring the DHCP server to support iSCSI boot is different for IPv4 and IPv6. Refer to the following sections:
10.3.1 DHCP iSCSI Boot Configurations for IPv4
The DHCP protocol includes a number of options that provide configuration information to the DHCP client. For iSCSI boot,
Broadcom adapters support the following DHCP configurations:
10.3.1.1 DHCP Option 17, Root Path
Option 17 is used to pass the iSCSI target information to the iSCSI client. The format of the root path as defined in IETC
RFC 4173 is:
iscsi:"<servername>":"<protocol>":"<port>":"<LUN>":"<targetname>
The parameters are defined in
Table 19
.
Table 19: DHCP Option 17 Parameter Definition
Parameter
Definition
"iscsi:"
A literal string.
<servername>
The IP address or FQDN of the iSCSI target
":"
Separator.
<protocol>
The IP protocol used to access the iSCSI target. Currently, only TCP is supported so the protocol is 6.
<port>
The port number associated with the protocol. The standard port number for iSCSI is 3260.
<LUN>
The Logical Unit Number to use on the iSCSI target. The value of the LUN must be represented in
hexadecimal format. A LUN with an ID OF 64 would have to be configured as 40 within the option 17
parameter on the DHCP server.
<targetname>
The target name in either IQN or EUI format (refer to RFC 3720 for details on both IQN and EUI formats).
An example IQN name would be iqn.1995-05.com.broadcom:iscsi-target.
