Segment Routing IPv6 Prefix-SID
draft-previdi-isis-ipv6-prefix-sid-02

The information below is for an old version of the document
Document Type Active Internet-Draft (individual)
Last updated 2016-05-17
Replaced by draft-bashandy-isis-srv6-extensions
Stream (None)
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
Network Working Group                                    S. Previdi, Ed.
Internet-Draft                                               L. Ginsberg
Intended status: Standards Track                             C. Filsfils
Expires: November 18, 2016                           Cisco Systems, Inc.
                                                            May 17, 2016

                    Segment Routing IPv6 Prefix-SID
                 draft-previdi-isis-ipv6-prefix-sid-02

Abstract

   This document defines the Segment Routing IPv6-Prefix-SID sub-TLV.
   This new sub-TLV allows to specify which of the prefixes advertised
   by a node are to be used as Segment Routing Identifiers (SID) for the
   IPv6 data plane.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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 November 18, 2016.

Copyright Notice

   Copyright (c) 2016 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

Previdi, et al.         Expires November 18, 2016               [Page 1]
Internet-Draft               IPv6 Prefix-SID                    May 2016

   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  IPv6 Prefix SID . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   4
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   With Segment Routing (SR)[I-D.ietf-spring-segment-routing], a node
   steers a packet through an ordered list of instructions, called
   segments.  Segments are identified through Segment Identifiers (SIDs)
   that are advertised by routing protocols.  The IS-IS extensions for
   SR information advertisement are defined in
   [I-D.ietf-isis-segment-routing-extensions].

   Segment Routing can be directly applied to the IPv6 data plane
   through the use of the Segment Routing Header defined in
   [I-D.ietf-6man-segment-routing-header].

   When applied to the IPv6 data plane, the SID is represented by an
   IPv6 address.  This document defines a new IS-IS Prefix sub-TLV where
   information related to the IPv6 address used as SR IPv6 SID is
   conveyed.

2.  IPv6 Prefix SID

   When SR is applied to the IPv6 data plane, Segment Identifiers (SIDs)
   are IPv6 addresses.  In a router, it is desirable to identify which
   of the local prefixes can be used as SIDs.  Also, and in order to
   provide the same functionalities defined in
   [I-D.ietf-spring-segment-routing] and according to
   [I-D.ietf-isis-segment-routing-extensions], a new sub-TLV is defined:
   the IPv6-Prefix-SID sub-TLV.

Previdi, et al.         Expires November 18, 2016               [Page 2]
Internet-Draft               IPv6 Prefix-SID                    May 2016

   The IPv6-Prefix-SID sub-TLV is attached to an IPv6 prefix advertised
   by a node and MAY be present in any of the following TLVs:

      TLV-236 (IPv6) defined in [RFC5308].

      TLV-237 (MT-IPv6) defined in [RFC5120].

   The IPv6-Prefix-SID sub-TLV is optional, MAY appear only once for a
   given prefix and has the following format:

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
Show full document text