Dell Emulex Family of Adapters - Manual (Page 1146)

Emulex Drivers Version 10.2 for VMware ESXi User Manual P010087-01A Rev. A
Appendix A. Configuring iSCSI Through DHCP
Dynamic Host Configuration Protocol (DHCP) Recommendations
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Appendix A. Configuring iSCSI Through DHCP
Dynamic Host Configuration Protocol (DHCP)
Recommendations
If you are using a DHCP server to obtain an IP address for your iSCSI initiator, Emulex
recommends that you set up a reservation. A reservation assigns a specific IP address
based on the MAC address of your iSCSI function. If you do not reserve an IP address
through DHCP, then you must set the lease length for the iSCSI initiator IP address to
unlimited. This prevents the IP address lease from expiring.
Vendor-Specific Option 43
The following section describes the format for the data returned in DHCP
vendor-specific option 43. The method and format for specifying the Vendor ID is
outside the scope of this document and is not included here. The initiator offers this
Vendor ID to the DHCP server to retrieve data in the format described in the following
section.
Format of Vendor-Specific Option 43
The data returned in DHCP vendor-specific option 43 uses the following format:
‘iscsi:’<TargetIP>’:’<TargetTCPPort>’:’<LUN>’:’<TargetName>’:’<Init
iatorName>’:’<HeaderDigest>’:’<DataDigest>’:’<AuthenticationType>
The guidelines for creating the data string include:

Strings shown in quotes are part of the syntax and are therefore mandatory.

Fields enclosed in angular brackets (including the angular brackets) should be
replaced with their corresponding values. Some of these fields are optional and
may be skipped.

If an optional field is skipped, a colon must be used as a placeholder to indicate
the default value for that field.

When specified, the value of each parameter should be enclosed in double
quotes.
All options are case sensitive.