MPLS Egress Protection Framework
draft-shen-mpls-egress-protection-framework-01

The information below is for an old version of the document
Document Type Active Internet-Draft (individual)
Last updated 2016-02-25
Replaced by draft-ietf-mpls-egress-protection-framework
Stream (None)
Intended RFC status (None)
Formats pdf htmlized 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)
Internet Engineering Task Force                               Yimin Shen
Internet-Draft                                           Minto Jeyananth
Intended status: Informational                          Juniper Networks
Expires: August 28, 2016                               February 25, 2016

                    MPLS Egress Protection Framework
             draft-shen-mpls-egress-protection-framework-01

Abstract

   This document specifies a fast reroute framework for protecting MPLS
   tunnels and IP/MPLS services against egress router failures.  The
   framework relies on local detection and local repair to be performed
   by the router upstream adjacent to a failure.  The router can restore
   traffic in the order of tens of milliseconds, by rerouting it to a
   protector through a pre-established bypass tunnel.  Therefore, the
   mechanism can be used to reduce traffic loss before global repair
   reacts to the failure and control plane protocols converge on the
   topology changes due to the failure.

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 August 28, 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
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect

Yimin Shen & Minto JeyanaExpires August 28, 2016                [Page 1]
Internet-Draft      MPLS Egress Protection Framework       February 2016

   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.  Specification of Requirements . . . . . . . . . . . . . . . .   4
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Theory of Operation . . . . . . . . . . . . . . . . . . . . .   6
     5.1.  Egress failure  . . . . . . . . . . . . . . . . . . . . .   6
     5.2.  Protector and PLR . . . . . . . . . . . . . . . . . . . .   6
     5.3.  Protected egress  . . . . . . . . . . . . . . . . . . . .   7
     5.4.  Egress-protected tunnel . . . . . . . . . . . . . . . . .   7
     5.5.  Egress-protected service  . . . . . . . . . . . . . . . .   7
     5.6.  Egress-protected service to egress-protected tunnel
           mapping . . . . . . . . . . . . . . . . . . . . . . . . .   8
     5.7.  Egress-protection bypass tunnel . . . . . . . . . . . . .   8
     5.8.  Context ID, context label, and context based forwarding .   8
     5.9.  IGP advertisement and path computation for context ID . .  10
     5.10. Egress-protection bypass tunnel establishment . . . . . .  11
     5.11. Local Repair on PLR . . . . . . . . . . . . . . . . . . .  11
     5.12. Label distribution from egress router to protector  . . .  12
   6.  Global repair . . . . . . . . . . . . . . . . . . . . . . . .  12
   7.  Example:  Layer-3 VPN egress protection . . . . . . . . . . .  12
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  15
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     11.2.  Informative References . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  16

1.  Introduction

   In MPLS networks, LSPs (label switched paths) are widely use as
   transport tunnels to carry IP and MPLS services across MPLS domains.
   Examples of MPLS services are layer-2 VPNs, layer-3 VPNs, etc.  In
   general, a single tunnel may carry multiple services of one or
   multiple types, given that these services have corresponding service
   instances on the tunnel's egress router.  An MPLS service instance
Show full document text