RFC 3442 (rfc3442) - Page 1 of 9


The Classless Static Route Option for Dynamic Host Configuration Protocol (DHCP) version 4



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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


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