Network Working Group O.
TroeanTroan Internet-Draft Cisco Systems Updates: 4861 (if approved) January 10,April 29, 2018 Intended status: Standards Track Expires: July 14,October 31, 2018 IANA Considerations for IPv6 ND PIONeighbor Discovery Prefix Information Option Flags IANA considerations draft-ietf-6man-ndpioiana-02draft-ietf-6man-ndpioiana-03 Abstract The Prefix Information Option in the IPv6 Neighbor Discovery Router Advertisement message defines an 8-bit flag field with two flags defined and the remaining 6 bits reserved (Reserved1). RFC 6275 has defined a new flag from this field without creating a IANA registry or updating RFC 4861. The purpose of this document is to request that IANA to createa new IANA registry for the PIO flags to avoid potential conflict in the use of theseflags. This document updates RFC 4861. 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 https://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 July 14,October 31, 2018. Copyright Notice Copyright (c) 2018 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 (https://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. 1. Introduction The Prefix Information Option (PIO) in the IPv6 Neighbor Discovery Router Advertisement defines an 8-bit flag field with two flags defined and the remaining 6 bits reserved (Reserved1). RFC 6275 has defined a new flag from this field without creating a IANA registry or updating RFC 4861. The purpose of this document is to request that IANAto create a new registry for the PIO flags to avoid potential conflict in the use of theseflags. 2. Current Prefix Information Option flags Currently, the NDPNeighbor Discovery Protocol Prefix Information Option [RFC4861] contains the following one-bit flags defined in published RFCs: 0 1 2 3 4 5 6 7 +-+-+-+-+-+-+-+-+ |L|A|R|Reserved1| +-+-+-+-+-+-+-+-+ Figure 1 L - On-link Flag [RFC4861] A - Autonomous Address Configuration Flag [RFC4861] R - Router Address Agent Flag [RFC6275] Reserved1 - Reserved 3. Updates to RFC4861 This document updates Section 4.6.2 "Prefix Information" of [RFC4861] to point to the new IANA registry that is created in this document. Specifically: The current list of flags in the Prefix Information Option can be found in [IANA-TBD].IANA-TBD. 4. IANA Considerations The IANA is requested to create a new registry for IPv6 NDNeighbor Discovery Prefix Information Option flags. This should include the current flags in the PIO option. The format for the registry is: +---------------+---------------------------------+-----------+ | RA Option Bit | Description | Reference | +---------------+---------------------------------+-----------+ | 0 | L - On-link Flag | [RFC4861] | | 1 | A - Autonomous Address | [RFC4861] | | | Configuration Flag | | | 2 | R - Router Address Flag | [RFC6275] | | 3-7 | Reserved | | +---------------+---------------------------------+-----------+ Figure 2 The assignment of new flags in the PIO option header require standards action.Standards Action. The registry for these flags should be added to: http://www.iana.org/assignments/icmpv6-parameters 5. Security Considerations This document has no security considerations. 6. References 6.1.Normative References [RFC4861] Narten, T., Nordmark, E., Simpson, W., and H. Soliman, "Neighbor Discovery for IP version 6 (IPv6)", RFC 4861, DOI 10.17487/RFC4861, September 2007, <https://www.rfc-editor.org/info/rfc4861>. 6.2. Informative References[RFC6275] Perkins, C., Ed., Johnson, D., and J. Arkko, "Mobility Support in IPv6", RFC 6275, DOI 10.17487/RFC6275, July 2011, <https://www.rfc-editor.org/info/rfc6275>. Author's Address Ole TroeanTroan Cisco Systems Philip Pedersens vei 1 Lysaker 1366 Norway Email: firstname.lastname@example.org