PROTECTION AND RESTORATION IN MPLS NETWORKS An examination of the methods for protecting MPLS LSPs against failures of network resources Version 2: October 2001 Ed Harrison, Development Manager, Data Connection (
[email protected]) Adrian Farrel previously Development Manager of DC-MPLS now Member of Technical Staff at Movaz Networks Inc. (
[email protected]) Ben Miller, MPLS General Manager, Data Connection (
[email protected]) Data Connection Limited 100 Church Street Enfield EN2 6BQ United Kingdom http://www.dataconnection.com Copyright © 2001-2004 Data Connection Ltd. All Rights Reserved Table of Contents 1 Introduction .................................................................................................................1 2 Background .................................................................................................................2 2.1 Introduction to MPLS ............................................................................................2 2.1.1 Label Distribution ...........................................................................................4 2.1.2 Tunnels and Label Stacks ...............................................................................5 2.2 Components of an MPLS Network........................................................................7 2.3 Potential Resource Failures..................................................................................10 2.4 Objectives for Failure Survival............................................................................10