Int-Area C. Pignataro Internet-Draft Cisco Systems Intended status: Standards Track F. Gont Expires: September 1, 2012 UTN-FRH / SI6 Networks February 29, 2012 Formally Obsoleting some Historic IPv4 Options draft-gp-intarea-obsolete-ipv4-options-iana-00 Abstract A number of IPv4 options have become obsolete in practice, but have never been formally obsoleted. This document obsoletes such IPv4 options, thus cleaning up the corresponding IANA registry, and serving as a basis for providing advice about the filtering of packets containing these options. Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on September 1, 2012. 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 Pignataro & Gont Expires September 1, 2012 [Page 1] Internet-Draft Obsoleting IPv4 Options February 2012 described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Discussion of Obsoleted Options . . . . . . . . . . . . . . . . 3 2.1. Stream ID . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2. Extended Internet Protocol . . . . . . . . . . . . . . . . 3 2.3. Traceroute . . . . . . . . . . . . . . . . . . . . . . . . 3 2.4. Address Extension . . . . . . . . . . . . . . . . . . . . . 3 2.5. Selective Directed Broadcast . . . . . . . . . . . . . . . 3 2.6. Dynamic Packet State . . . . . . . . . . . . . . . . . . . 3 2.7. Upstream Multicast Pkt. . . . . . . . . . . . . . . . . . . 4 3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 4 4. Security Considerations . . . . . . . . . . . . . . . . . . . . 4 5. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 4 6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 5 6.1. Normative References . . . . . . . . . . . . . . . . . . . 5 6.2. Informative References . . . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 6 Pignataro & Gont Expires September 1, 2012 [Page 2] Internet-Draft Obsoleting IPv4 Options February 2012 1. Introduction The Internet Protocol version 4 (IPv4) [RFC0791] 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 obsoleted. This document obsoletes such IPv4 options, "cleaning up" the corresponding IANA registry. 2. Discussion of Obsoleted Options 2.1. Stream ID The Stream ID option is obsolete. It is specified in RFC 791 [RFC0791], and obsoleted in Section 3.2.1.8 of RFC 1122 [RFC1122] and Section 4.2.2.1 of RFC 1812 [RFC1812]. 2.2. Extended Internet Protocol The Extended Internet Protocol option is defined in [RFC1385], and is superseded by [RFC2460]. 2.3. Traceroute The Traceroute option is defined in [RFC1393]. The Traceroute option is defined as "experimental" and it was never widely deployed on the public Internet. 2.4. Address Extension The Address Extension option is defined in the Experimental [RFC1475], and marked as IPv7. 2.5. Selective Directed Broadcast The Selective Directed Broadcast option is originally defined in [RFC1770]. 2.6. Dynamic Packet State The Dynamic Packet State option was specified in [I-D.stoica-diffserv-dps]. The aforementioned document was meant to be published as "Experimental", but never made it into an RFC. Pignataro & Gont Expires September 1, 2012 [Page 3] Internet-Draft Obsoleting IPv4 Options February 2012 2.7. Upstream Multicast Pkt. This options was originally specified in [draft-farinacci-bidir-pim]. Its use was obsoleted by [RFC5015], which employs a control plane mechanism to solve the problem of doing upstream forwarding of multicast packets on a multi-access LAN. 3. IANA Considerations The "IP OPTION NUMBERS" registry [IANA-IP] contains the list of the currently assigned IP option numbers. This registry also denotes an obsoleted IP Option Number by marking it with a single asterisk ("*"). This document formally obsoletes the following options, and requests IANA to mark them as such in the corresponding registry [IANA-IP]. Copy Class Number Value Name Reference ---- ----- ------ ----- ------------------------------- ------------ 1 0 8 136 SID - Stream ID [RFC791,JBP]* 0 0 11 11 MTUP - MTU Probe [RFC1191]* 0 0 12 12 MTUR - MTU Reply [RFC1191]* 1 0 17 145 EIP - Extended Internet Protocol[RFC1385]* 0 2 18 82 TR - Traceroute [RFC1393]* 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]* 4. Security Considerations This document does not modify the security properties of the IPv4 Options being obsoleted. However, formally obsoleting these options serves as a basis for e.g. providing advice about filtering packets containing these options (as in [I-D.gont-opsec-ip-options-filtering]). 5. Acknowledgments The authors would like to thank Ron Bonica for his guidance. The authors would like to thank Ran Atkinson, Fred Baker, Dino Farinacci, and Andrew Malis for providing insights on some of the options being formally obsoleted by this document. Pignataro & Gont Expires September 1, 2012 [Page 4] Internet-Draft Obsoleting IPv4 Options February 2012 6. References 6.1. Normative References [RFC0791] Postel, J., "Internet Protocol", STD 5, RFC 791, September 1981. [RFC1122] Braden, R., "Requirements for Internet Hosts - Communication Layers", STD 3, RFC 1122, October 1989. [RFC1191] Mogul, J. and S. Deering, "Path MTU discovery", RFC 1191, November 1990. [RFC1393] Malkin, G., "Traceroute Using an IP Option", RFC 1393, January 1993. [RFC1812] Baker, F., "Requirements for IP Version 4 Routers", RFC 1812, June 1995. 6.2. Informative References [I-D.gont-opsec-ip-options-filtering] Gont, F., Atkinson, R., and C. Pignataro, "Recommendations on filtering of IPv4 packets containing IPv4 options", draft-gont-opsec-ip-options-filtering-03 (work in progress), February 2012. [I-D.stoica-diffserv-dps] Stoica, I., Zhang, H., Baker, F., and Y. Bernet, "Per Hop Behaviors Based on Dynamic Packet State", draft-stoica-diffserv-dps-02 (work in progress), October 2002. [IANA-IP] Internet Assigned Numbers Authority, "IP OPTION NUMBERS", April 2011, . [RFC1063] Mogul, J., Kent, C., Partridge, C., and K. McCloghrie, "IP MTU discovery options", RFC 1063, July 1988. [RFC1385] Wang, Z., "EIP: The Extended Internet Protocol", RFC 1385, November 1992. [RFC1475] Ullmann, R., "TP/IX: The Next Internet", RFC 1475, June 1993. [RFC1770] Graff, C., "IPv4 Option for Sender Directed Multi- Destination Delivery", RFC 1770, March 1995. Pignataro & Gont Expires September 1, 2012 [Page 5] Internet-Draft Obsoleting IPv4 Options February 2012 [RFC2460] Deering, S. and R. Hinden, "Internet Protocol, Version 6 (IPv6) Specification", RFC 2460, December 1998. [RFC5015] Handley, M., Kouvelas, I., Speakman, T., and L. Vicisano, "Bidirectional Protocol Independent Multicast (BIDIR- PIM)", RFC 5015, October 2007. [draft-farinacci-bidir-pim] Estrin, D. and D. Farinacci, "Bi-Directional Shared Trees in PIM-SM", IETF Internet Draft, draft-farinacci-bidir-pim, work in progress, May 1999. Authors' Addresses Carlos Pignataro Cisco Systems 7200-12 Kit Creek Road Research Triangle Park, NC 27709 US 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 Expires September 1, 2012 [Page 6]