IPv6 ND PIO Flags IANA considerations
draft-troan-6man-ndpioiana-01

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Network Working Group                                          O. Troean
Internet-Draft                                             Cisco Systems
Updates: rfc4861 (if approved)                        September 19, 2017
Intended status: Standards Track
Expires: March 23, 2018

                 IPv6 ND PIO Flags IANA considerations
                     draft-troan-6man-ndpioiana-01

Abstract

   The Prefix Information Option in the IPv6 Neighbor Discovery Router
   Advertisement defines an 8-bit flag field with two flags defined and
   the remaining 6 bits reservered (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 IANA to create
   a new registry for the PIO flags to avoid potential conflict in the
   use of these flags.

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   This Internet-Draft will expire on March 23, 2018.

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Troean                   Expires March 23, 2018                 [Page 1]
Internet-Draft                                            September 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Current Prefix Information Option flags . . . . . . . . . . .   2
   3.  Updates to RFC4861  . . . . . . . . . . . . . . . . . . . . .   3
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .   3
     5.2.  Informative References  . . . . . . . . . . . . . . . . .   4
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   The Prefix Information Option in the IPv6 Neighbor Discovery Router
   Advertisement defines an 8-bit flag field with two flags defined and
   the remaining 6 bits reservered (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 IANA to create
   a new registry for the PIO flags to avoid potential conflict in the
   use of these flags.

2.  Current Prefix Information Option flags

   Currently, the NDP Prefix Information Option 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

Troean                   Expires March 23, 2018                 [Page 2]
Internet-Draft                                            September 2017

3.  Updates to RFC4861

   This document updates RFC4861 with the new IANA Considerations
   section specified below.

4.  IANA Considerations

   The IANA is requested to create a new registry for IPv6 ND 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 |
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