RFC 3442 (rfc3442) - Page 1 of 9
The Classless Static Route Option for Dynamic Host Configuration Protocol (DHCP) version 4
Alternative Format: Original Text Document
Network Working Group T. Lemon
Request for Comments: 3442 Nominum, Inc.
Updates: 2132 S. Cheshire
Category: Standards Track Apple Computer, Inc.
B. Volz
Ericsson
December 2002
The Classless Static Route Option for
Dynamic Host Configuration Protocol (DHCP) version 4
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2002). All Rights Reserved.
Abstract
This document defines a new Dynamic Host Configuration Protocol
(DHCP) option which is passed from the DHCP Server to the DHCP Client
to configure a list of static routes in the client. The network
destinations in these routes are classless - each routing table entry
includes a subnet mask.
Introduction
This option obsoletes the Static Route option (option 33) defined in
RFC 2132 [4].
The IP protocol [1] uses routers to transmit packets from hosts
connected to one IP subnet to hosts connected to a different IP
subnet. When an IP host (the source host) wishes to transmit a
packet to another IP host (the destination), it consults its routing
table to determine the IP address of the router that should be used
to forward the packet to the destination host.
The routing table on an IP host can be maintained in a variety of
ways - using a routing information protocol such as RIP [8], ICMP
router discovery [6,9] or using the DHCP Router option, defined in
RFC 2132 [4].
Lemon, et. al. Standards Track