SRv6 Path Egress Protection
draft-hu-rtgwg-srv6-egress-protection-00

Document Type Active Internet-Draft (individual)
Last updated 2019-03-05
Stream (None)
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
On Agenda rtgwg at IETF-104
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
Network Working Group                                              Z. Hu
Internet-Draft                                                   H. Chen
Intended status: Standards Track                                   P. Wu
Expires: September 6, 2019                           Huawei Technologies
                                                           March 5, 2019

                      SRv6 Path Egress Protection
                draft-hu-rtgwg-srv6-egress-protection-00

Abstract

   This document describes protocol extensions and procedures for
   protecting the egress node of a Segment Routing for IPv6 (SRv6) path.

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 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 September 6, 2019.

Copyright Notice

   Copyright (c) 2019 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

Hu, et al.              Expires September 6, 2019               [Page 1]
Internet-Draft              Egress Protection                 March 2019

   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.  Terminologies . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  SR Path Egress Protection . . . . . . . . . . . . . . . . . .   3
   4.  Extensions to IGP for Egress Protection . . . . . . . . . . .   5
     4.1.  Extensions to IS-IS . . . . . . . . . . . . . . . . . . .   5
     4.2.  Extensions to OSPF  . . . . . . . . . . . . . . . . . . .   7
   5.  Behavior for SRv6 Mirror SID  . . . . . . . . . . . . . . . .   9
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   9
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   Fast protection of a transit node of a Segment Routing (SR) path is
   described in [I-D.bashandy-rtgwg-segment-routing-ti-lfa] and
   [I-D.hu-spring-segment-routing-proxy-forwarding].  However, these
   documents do not discuss the procedures for fast protection of the
   egress node of a Segment Routing for IPv6 (SRv6) path.

   This document fills that void and specifies protocol extensions and
   procedures for fast protection of the egress node of an SRv6 path.
   Egress node and egress as well as fast protection and protection will
   be used exchangeably.

2.  Terminologies

   The following terminologies are used in this document.

   SR:  Segment Routing

   SRv6:  SR for IPv6

   SRH:  Segment Routing Header

   SID:  Segment Identifier

   CE:  Customer Edge

Hu, et al.              Expires September 6, 2019               [Page 2]
Internet-Draft              Egress Protection                 March 2019

   PE:  Provider Edge

   LFA:  Loop-Free Alternate

   TI-LFA:  Topology Independent LFA

   TE:  Traffic Engineering

   BFD:  Bidirectional Forwarding Detection

   VPN:  Virtual Private Network

   L3VPN:  Layer 3 VPN

   VRF:  Virtual Routing and Forwarding

   FIB:  Forwarding Information Base

   PLR:  Point of Local Repair

   BGP:  Border Gateway Protocol

   IGP:  Interior Gateway Protocol

   OSPF:  Open Shortest Path First
Show full document text