Analysis of Inter-Domain Label Switched Path (LSP) Recovery
RFC 5298

 
Document Type RFC - Informational (August 2008; Errata)
Last updated 2013-03-02
Replaces draft-takeda-ccamp-inter-domain-recovery-analysis
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IESG IESG state RFC 5298 (Informational)
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Responsible AD Ross Callon
Send notices to ccamp-chairs@ietf.org, draft-ietf-ccamp-inter-domain-recovery-analysis@ietf.org
Network Working Group                                     T. Takeda, Ed.
Request for Comments: 5298                                           NTT
Category: Informational                                   A. Farrel, Ed.
                                                      Old Dog Consulting
                                                              Y. Ikejiri
                                                      NTT Communications
                                                             JP. Vasseur
                                                     Cisco Systems, Inc.
                                                             August 2008

      Analysis of Inter-Domain Label Switched Path (LSP) 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.

Abstract

   Protection and recovery are important features of service offerings
   in Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS)
   networks.  Increasingly, MPLS and GMPLS networks are being extended
   from single domain scope to multi-domain environments.

   Various schemes and processes have been developed to establish Label
   Switched Paths (LSPs) in multi-domain environments.  These are
   discussed in RFC 4726: "A Framework for Inter-Domain Multiprotocol
   Label Switching Traffic Engineering".

   This document analyzes the application of these techniques to
   protection and recovery in multi-domain networks.  The main focus for
   this document is on establishing end-to-end diverse Traffic
   Engineering (TE) LSPs in multi-domain networks.

Takeda, et al.               Informational                      [Page 1]
RFC 5298         Analysis of Inter-Domain LSP Recovery       August 2008

Table of Contents

   1. Introduction ....................................................3
      1.1. Terminology ................................................3
      1.2. Domain .....................................................4
      1.3. Document Scope .............................................5
      1.4. Note on Other Recovery Techniques ..........................6
      1.5. Signaling Options ..........................................6
   2. Diversity in Multi-Domain Networks ..............................6
      2.1. Multi-Domain Network Topology ..............................7
      2.2. Note on Domain Diversity ...................................8
   3. Factors to Consider .............................................9
      3.1. Scalability versus Optimality ..............................9
      3.2. Key Concepts ..............................................10
   4. Diverse LSP Setup Schemes without Confidentiality ..............12
      4.1. Management Configuration ..................................12
      4.2. Head-End Path Computation (with Multi-Domain Visibility) ..12
      4.3. Per-Domain Path Computation ...............................12
           4.3.1. Sequential Path Computation ........................13
           4.3.2. Simultaneous Path Computation ......................14
      4.4. Inter-Domain Collaborative Path Computation ...............15
           4.4.1. Sequential Path Computation ........................15
           4.4.2. Simultaneous Path Computation ......................15
   5. Diverse LSP Setup Schemes with Confidentiality .................16
      5.1. Management Configuration ..................................17
      5.2. Head-End Path Computation (with Multi-Domain Visibility) ..17
      5.3. Per-Domain Path Computation ...............................17
           5.3.1. Sequential Path Computation ........................18
           5.3.2. Simultaneous Path Computation ......................19
      5.4. Inter-Domain Collaborative Path Computation ...............20
           5.4.1. Sequential Path Computation ........................20
           5.4.2. Simultaneous Path Computation ......................20
   6. Network Topology Specific Considerations .......................20
   7. Addressing Considerations ......................................21
   8. Note on SRLG Diversity .........................................21
   9. Security Considerations ........................................21
   10. References ....................................................22
      10.1. Normative References .....................................22
      10.2. Informative References ...................................22
   11. Acknowledgements ..............................................25

Takeda, et al.               Informational                      [Page 2]
RFC 5298         Analysis of Inter-Domain LSP Recovery       August 2008

1.  Introduction
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