B-1
User Guide for Cisco Network Registrar, 7.1
OL-16002-01
A P P E N D I X
B
DHCP Options
DHCP provides a framework for passing configuration information to hosts on a TCP/IP network.
Configuration parameters and other control information are carried in tagged data items that are stored
in the options field of the DHCP message. The data items themselves are also called options.
This appendix contains DHCP options and BOOTP vendor extensions from RFC 2132, and includes the
validation type for each option, as indicated in
.
This appendix also contains the standard Microsoft client options and several tables displaying the
options sorted by categories.
Option Descriptions
The following sections describe the DHCP options in detail:
•
RFC 1497 Vendor Extensions, page B-1
•
IP Layer Parameters Per Host, page B-3
•
IP Layer Parameters Per Interface, page B-4
•
Link Layer Parameters Per Interface, page B-4
•
•
Application and Service Parameters, page B-5
•
DHCPv4 Extension Options, page B-8
•
•
Microsoft Client Options, page B-13
•
•
Options by Network Registrar Name, page B-18
•
Option Validation Types, page B-24
RFC 1497 Vendor Extensions
lists the vendor extensions as defined in RFC 1497.