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RFC 6814 - úplné znění

Plné znění RFC 6814:






Internet Engineering Task Force (IETF)                      C. Pignataro
Request for Comments: 6814                                 Cisco Systems
Obsoletes: 1385, 1393, 1475, 1770                                F. Gont
Category: Standards Track                         UTN-FRH / SI6 Networks
ISSN: 2070-1721                                            November 2012


                 Formally Deprecating Some IPv4 Options

Abstract

   A number of IPv4 options have become obsolete in practice, but have
   never been formally deprecated.  This document deprecates such IPv4
   options, thus cleaning up the corresponding IANA registry.
   Additionally, it obsoletes RFCs 1385, 1393, 1475, and 1770, and
   requests that the RFC Editor change their status to Historic.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/RFC 6814.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.






Pignataro & Gont             Standards Track                    [Page 1]

RFC 6814 Deprecating Some IPv4 Options November 2012 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Discussion of Deprecated Options . . . . . . . . . . . . . . . 2 2.1. Stream ID . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.2. Extended Internet Protocol . . . . . . . . . . . . . . . . 3 2.3. Traceroute . . . . . . . . . . . . . . . . . . . . . . . . 3 2.4. ENCODE . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.5. VISA . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.6. Address Extension . . . . . . . . . . . . . . . . . . . . . 3 2.7. Selective Directed Broadcast . . . . . . . . . . . . . . . 3 2.8. Dynamic Packet State . . . . . . . . . . . . . . . . . . . 3 2.9. Upstream Multicast Pkt. . . . . . . . . . . . . . . . . . . 3 3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4 4. Changing the Status of the Corresponding RFCs to Historic . . . 4 5. Security Considerations . . . . . . . . . . . . . . . . . . . . 4 6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 4 7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5 7.1. Normative References . . . . . . . . . . . . . . . . . . . 5 7.2. Informative References . . . . . . . . . . . . . . . . . . 5 1. Introduction The Internet Protocol version 4 (IPv4) [RFC 791] provides for expansion of the protocol by supporting a number of "options" in the variable-length IPv4 header. IPv4 options are identified by an option "type" value, whose registration is managed by IANA [IANA-IP]. A number of IPv4 options have become obsolete in practice, but have never been formally deprecated. This document deprecates such IPv4 options, thus cleaning up the corresponding IANA registry. This document also obsoletes [RFC 1385], [RFC 1393], [RFC 1475], and [RFC 1770], and requests that the RFC Editor change their status to Historic. 2. Discussion of Deprecated Options The following subsections discuss the options being deprecated. No other reference information has been found. 2.1. Stream ID The Stream ID option is obsolete. It is specified in RFC 791 [RFC 791], and is deprecated in Section 3.2.1.8 of RFC 1122 [RFC 1122] and Section 4.2.2.1 of RFC 1812 [RFC 1812]. Pignataro & Gont Standards Track [Page 2]
RFC 6814 Deprecating Some IPv4 Options November 2012 2.2. Extended Internet Protocol The Extended Internet Protocol option is defined in [RFC 1385] and is superseded by [RFC 2460]. 2.3. Traceroute The Traceroute option is defined in [RFC 1393]. The Traceroute option is defined as Experimental; it was never widely deployed on the public Internet. 2.4. ENCODE This option was used for experimentation around IP-layer encryption. No products are known to ever have shipped with support for this option. 2.5. VISA This option was part of an experiment [VISA87] [VISA89] at USC and was never widely deployed. 2.6. Address Extension The Address Extension option is defined in an Experimental RFC [RFC 1475] and marked as IPv7. IPv7 was never widely deployed. 2.7. Selective Directed Broadcast The Selective Directed Broadcast option was originally defined in [RFC 1770]. This option was never widely deployed and the approach was abandoned. 2.8. Dynamic Packet State The Dynamic Packet State option was specified in [DIFFSERV-DPS]. The aforementioned document was meant to be published as Experimental, but it never became an RFC. The IP option was never widely deployed. 2.9. Upstream Multicast Pkt. This option was originally specified in [BIDIR-PIM]. Its use was deprecated by [RFC 5015], which employs a control-plane mechanism to solve the problem of doing upstream forwarding of multicast packets on a multi-access LAN. Pignataro & Gont Standards Track [Page 3]
RFC 6814 Deprecating Some IPv4 Options November 2012 3. IANA Considerations The "IP OPTION NUMBERS" registry [IANA-IP] contains the list of currently assigned IP option numbers. This registry also denotes a deprecated IP Option Number by marking it with a footnote. This document formally deprecates the following options. IANA has marked them as such in the corresponding registry [IANA-IP]. Copy Class Number Value Name Reference ---- ----- ------ ----- ------------------------------- ------------ 1 0 8 136 SID - Stream ID [RFC 791,JBP] 1 0 14 142 VISA - Experimental Access Control [Estrin] 0 0 15 15 ENCODE - ??? [VerSteeg] 1 0 17 145 EIP - Extended Internet Protocol [RFC 1385] 0 2 18 82 TR - Traceroute [RFC 1393] 1 0 19 147 ADDEXT - Address Extension [Ullmann IPv7] 1 0 21 149 SDB - Selective Directed Broadcast [Graff] 1 0 23 151 DPS - Dynamic Packet State [Malis] 1 0 24 152 UMP - Upstream Multicast Pkt. [Farinacci] The IP options "MTU Probe" (MTUP, value 11) and "MTU Reply" (MTUR, value 12) were initially defined in [RFC 1063] and have already been deprecated by [RFC 1191]. 4. Changing the Status of the Corresponding RFCs to Historic Per this document, the RFC Editor has changed the status of [RFC 1385], [RFC 1393], [RFC 1475], and [RFC 1770] to Historic. 5. Security Considerations This document does not modify the security properties of the IPv4 options being deprecated. 6. Acknowledgments The authors would like to thank Ron Bonica for his guidance. The authors would like to thank Ran Atkinson, Fred Baker, Deborah Estrin, Dino Farinacci, Andrew Malis, Gene Tsudik, and Bill VerSteeg for providing insights on some of the options being formally deprecated by this document. Pignataro & Gont Standards Track [Page 4]
RFC 6814 Deprecating Some IPv4 Options November 2012 7. References 7.1. Normative References [RFC 791] Postel, J., "Internet Protocol", STD 5, RFC 791, September 1981. [RFC 1122] Braden, R., Ed., "Requirements for Internet Hosts - Communication Layers", STD 3, RFC 1122, October 1989. 7.2. Informative References [BIDIR-PIM] Estrin, D. and D. Farinacci, "Bi-Directional Shared Trees in PIM-SM", Work in Progress, May 1999. [DIFFSERV-DPS] Stoica, I., Zhang, H., Venkitaraman, N., and J. Mysore, "Per Hop Behaviors Based on Dynamic Packet State", Work in Progress, October 2002. [IANA-IP] Internet Assigned Numbers Authority, "IP OPTION NUMBERS", <http://www.iana.org/assignments/ip-parameters>. [RFC 1063] Mogul, J., Kent, C., Partridge, C., and K. McCloghrie, "IP MTU discovery options", RFC 1063, July 1988. [RFC 1191] Mogul, J. and S. Deering, "Path MTU discovery", RFC 1191, November 1990. [RFC 1385] Wang, Z., "EIP: The Extended Internet Protocol", RFC 1385, November 1992. [RFC 1393] Malkin, G., "Traceroute Using an IP Option", RFC 1393, January 1993. [RFC 1475] Ullmann, R., "TP/IX: The Next Internet", RFC 1475, June 1993. [RFC 1770] Graff, C., "IPv4 Option for Sender Directed Multi- Destination Delivery", RFC 1770, March 1995. [RFC 1812] Baker, F., Ed., "Requirements for IP Version 4 Routers", RFC 1812, June 1995. [RFC 2460] Deering, S. and R. Hinden, "Internet Protocol, Version 6 (IPv6) Specification", RFC 2460, December 1998. Pignataro & Gont Standards Track [Page 5]
RFC 6814 Deprecating Some IPv4 Options November 2012 [RFC 5015] Handley, M., Kouvelas, I., Speakman, T., and L. Vicisano, "Bidirectional Protocol Independent Multicast (BIDIR- PIM)", RFC 5015, October 2007. [VISA87] Estrin, D. and G. Tsudik, "VISA Scheme for Inter- Organizational Network Security", IEEE Symposium on Security and Privacy (S&P), 1987. [VISA89] Estrin, D., Mogul, J., and G. Tsudik, "VISA Protocols for Controlling Inter-Organizational Datagram Flow", IEEE Journal on Selected Areas in Communications, 1989. Authors' Addresses Carlos Pignataro Cisco Systems 7200-12 Kit Creek Road Research Triangle Park, NC 27709 United States EMail: cpignata@cisco.com Fernando Gont UTN-FRH / SI6 Networks Evaristo Carriego 2644 Haedo, Provincia de Buenos Aires 1706 Argentina Phone: +54 11 4650 8472 EMail: fgont@si6networks.com URI: http://www.si6networks.com Pignataro & Gont Standards Track [Page 6]


English version: RFC 6814