Unused Dynamic Host Configuration Protocol (DHCP) Option Codes
RFC 3679

Network Working Group                                           R. Droms
Request for Comments: 3679                                 Cisco Systems
Category: Informational                                     January 2004

     Unused Dynamic Host Configuration Protocol (DHCP) Option Codes

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).  All Rights Reserved.

Abstract

   Prior to the publication of RFC 2489 (which was updated by RFC 2939),
   several option codes were assigned to proposed Dynamic Host
   Configuration Protocol (DHCP) options that were subsequently never
   used.  This document lists those unused option codes and directs IANA
   to make these option codes available for assignment to other DHCP
   options in the future.

   The document also lists several option codes that are not currently
   documented in an RFC but should not be made available for
   reassignment to future DHCP options.

1. Introduction

   Section 2 of this document lists the unused DHCP option codes from
   the IANA list of BOOTP and DHCP option codes [1].  Each option code
   includes any known documentation and contact information from the
   IANA list.  IANA will make these option codes available for
   assignment to other DHCP options in the future.

   Section 3 lists several DHCP option codes that are not currently
   documented in an RFC but should not be made available for
   reassignment to future DHCP options.

2. Unused DHCP Option Codes to be Reassigned to Future DHCP Options

   The option codes listed in this section are to be returned to IANA
   for reassignment to new options.  Responses from associated contact
   persons are noted where they have been received.

Droms                        Informational                      [Page 1]
RFC 3679                Unused DHCP Option Codes            January 2004

2.1. Service Location Protocol Naming Authority

   Code:              80
   Name:              Service Location Protocol Naming Authority
   Defined in:        (expired Internet-Draft)
   Contact:           Charlie Perkins
   Reason to recover: Never published as standard and not in general use

2.2. Relay Agent Options

   Codes:             83, 84
   Name:              Relay Agent Options
   Defined in:        Early draft of RFC 3046 [2]
   Contact:           (none)
   Reason to recover: Not defined in RFC 3046 as published

2.3. IEEE 1003.1 POSIX Timezone

   Code:              88
   Name:              IEEE 1003.1 POSIX Timezone
   Defined in:        (expired Internet-Draft)
   Contact:           Mike Carney
   Reason to recover: Never published as standard and not in general use

2.4. FQDNs in DHCP Options

   Code:              89
   Name:              FQDNs in DHCP Options
   Defined in:        (expired Internet-Draft)
   Contact:           Ralph Droms; agrees that option code should be
                      reassigned
   Reason to recover: Never published as standard and not in general use

2.5. VINES TCP/IP Server

   Code:              91
   Name:              VINES TCP/IP Server
   Defined in:        (none)
   Contact:           (none)
   Reason to recover: Never published as Internet-Draft

2.6. Server Selection

   Code:              92
   Name:              Server Selection
   Defined in:        (none)
   Contact:           (none)
   Reason to recover: Never published as Internet-Draft

Droms                        Informational                      [Page 2]
RFC 3679                Unused DHCP Option Codes            January 2004

2.7 IPv6 Transition

   Code:              96
   Name:              IPv6 Transition
   Defined in:        (expired Internet-Draft)
   Contact:           Dan Harrington; agrees that option code should be
                      reassigned
   Reason to recover: Never published as standard and not in general use

2.8. Printer Name

   Code:              100
   Name:              Printer Name
   Defined in:        (none)
   Contact:           (none)
   Reason to recover: Never published as Internet-Draft

2.9. Multicast Assignment through DHCP

   Code:              101
   Name:              Multicast Assignment through DHCP
   Defined in:        (expired Internet-Draft)
   Contact:           Baiju Patel, Munil Shah
   Reason to recover: Never published as standard and not in general use

2.10. Swap Path