RFC 3469 (rfc3469) - Page 2 of 40

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

RFC 3469           Framework for MPLS-based Recovery       February 2003


              2.3.2   Failure Terminology..........................17
        2.4.  Abbreviations........................................18
   3.   MPLS-based Recovery Principles.............................18
        3.1.  Configuration of Recovery............................19
        3.2.  Initiation of Path Setup.............................19
        3.3.  Initiation of Resource Allocation....................20
              3.3.1   Subtypes of Protection Switching.............21
        3.4.  Scope of Recovery....................................21
              3.4.1   Topology.....................................21
              3.4.2   Path Mapping.................................24
              3.4.3   Bypass Tunnels...............................25
              3.4.4   Recovery Granularity.........................25
              3.4.5   Recovery Path Resource Use...................26
        3.5.  Fault Detection......................................26
        3.6.  Fault Notification...................................27
        3.7.  Switch-Over Operation................................28
              3.7.1   Recovery Trigger.............................28
              3.7.2   Recovery Action..............................29
        3.8.  Post Recovery Operation..............................29
              3.8.1   Fixed Protection Counterparts................29
              3.8.2   Dynamic Protection Counterparts..............30
              3.8.3   Restoration and Notification.................31
              3.8.4   Reverting to Preferred Path
                      (or Controlled Rearrangement)................31
        3.9.  Performance..........................................32
   4.   MPLS Recovery Features.....................................32
   5.   Comparison Criteria........................................33
   6.   Security Considerations....................................35
   7.   Intellectual Property Considerations.......................36
   8.   Acknowledgements...........................................36
   9.   References.................................................36
        9.1   Normative References.................................36
        9.2   Informative References...............................37
   10.  Contributing Authors.......................................37
   11.  Authors' Addresses.........................................39
   12.  Full Copyright Statement...................................40

1. Introduction

   This memo describes a framework for MPLS-based recovery.  We provide
   a detailed taxonomy of recovery terminology, and discuss the
   motivation for, the objectives of, and the requirements for MPLS-
   based recovery. We outline principles for MPLS-based recovery, and
   also provide comparison criteria that may serve as a basis for
   comparing and evaluating different recovery schemes.






Sharma & Hellstrand          Informational