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Framework for Multi-Protocol Label Switching (MPLS)-based Recovery (RFC3469)

IP.com Disclosure Number: IPCOM000011405D
Original Publication Date: 2003-Feb-01
Included in the Prior Art Database: 2003-Feb-19
Document File: 41 page(s) / 89K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

V. Sharma: AUTHOR [+4]

Abstract

Multi-protocol label switching (MPLS) integrates the label swapping forwarding paradigm with network layer routing. To deliver reliable service, MPLS requires a set of procedures to provide protection of the traffic carried on different paths. This requires that the label switching routers (LSRs) support fault detection, fault notification, and fault recovery mechanisms, and that MPLS signaling support the configuration of recovery. With these objectives in mind, this document specifies a framework for MPLS based recovery. Restart issues are not included in this framework.

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Network Working Group� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � V. Sharma, Ed.

Request for Comments: 3469� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Metanoia, Inc.

Category: Informational� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � F. Hellstrand, Ed.

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � Nortel Networks

� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � February 2003

� Framework for Multi-Protocol Label Switching (MPLS)-based Recovery

Status of this Memo

� � This memo provides information for the Internet community.� It does

� � not specify an Internet standard of any kind.� Distribution of this

� � memo is unlimited.

Copyright Notice

� � Copyright (C) The Internet Society (2003).� All Rights Reserved.

Abstract

� � Multi-protocol label switching (MPLS) integrates the label swapping

� � forwarding paradigm with network layer routing.� To deliver reliable

� � service, MPLS requires a set of procedures to provide protection of

� � the traffic carried on different paths.� This requires that the label

� � switching routers (LSRs) support fault detection, fault notification,

� � and fault recovery mechanisms, and that MPLS signaling support the

� � configuration of recovery.� With these objectives in mind, this

� � document specifies a framework for MPLS based recovery.� Restart

� � issues are not included in this framework.

Table of Contents

� � 1.� � Introduction................................................2

� � � � � � � 1.1.� Background............................................3

� � � � � � � 1.2.� Motivation for MPLS-Based Recovery....................4

� � � � � � � 1.3.� Objectives/Goals......................................5

� � 2.� � Overview....................................................6

� � � � � � � 2.1.� Recovery Models.......................................7

� � � � � � � � � � � � � 2.1.1� � Rerouting.....................................7

� � � � � � � � � � � � � 2.1.2� � Protection Switching..........................8

� � � � � � � 2.2.� The Recovery Cycles...................................8

� � � � � � � � � � � � � 2.2.1� � MPLS Recovery Cycle Model.....................8

� � � � � � � � � � � � � 2.2.2� � MPLS Reversion Cycle Model...................10

� � � � � � � � � � � � � 2.2.3� � Dynamic Re-routing Cycle Model...............12

� � � � � � � � � � � � � 2.2.4� � Example Recovery Cycle.......................13

� � � � � � � 2.3.� Definitions and Terminology..........................14

� � � � � � � � � � � � � 2.3.1� � General Recovery Terminology.................14

Sharma & Hellstrand� � � � � � � � � Informational� � � � � � � � � � � � � � � � � � � � � [Page 1]

RFC 3469� � � � � � � � � � Framework for MPLS-based Recovery� � � � � � February 2003

� � � � � � � � � � � � � 2.3.2� � Failure Terminology................