RFC 3472 (rfc3472) - Page 2 of 23


Generalized Multi-Protocol Label Switching (GMPLS) Signaling Constraint-based Routed Label Distribution Protocol (CR-LDP) Extensions



Alternative Format: Original Text Document

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RFC 3472          GMPLS Signaling - CR-LDP Extensions       January 2003


   6.  Protection TLV  ............................................  10
    6.1  Procedures  ..............................................  11
   7.  Administrative Status Information  .........................  11
    7.1  Admin Status TLV  ........................................  11
    7.2  REQUEST and MAPPING Message Procedures  ..................  12
    7.3  Notification Message Procedures  .........................  13
   8.  Control Channel Separation  ................................  14
    8.1  Interface Identification  ................................  14
    8.2  Errored Interface Identification  ........................  15
   9.  Fault Handling     .........................................  17
   10  Acknowledgments  ...........................................  17
   11. Security Considerations  ...................................  17
   12. IANA Considerations  .......................................  17
   13. Intellectual Property Considerations  ......................  18
   14. References  ................................................  18
    14.1  Normative References  ...................................  18
    14.2  Informative References  .................................  19
   15. Contributors  ..............................................  19
   16. Editors' Addresses  ........................................  22
   17. Full Copyright Statement ...................................  23

1. Introduction

   Generalized MPLS extends MPLS from supporting packet (PSC) interfaces
   and switching to include support of three new classes of interfaces
   and switching: Time-Division Multiplex (TDM), Lambda Switch (LSC) and
   Fiber-Switch (FSC).  A functional description of the extensions to
   MPLS signaling needed to support the new classes of interfaces and
   switching is provided in [RFC 3471].  This document presents CR-LDP
   specific formats and mechanisms needed to support all four classes of
   interfaces.  RSVP-TE extensions can be found in [RFC 3473].

   [RFC 3471] should be viewed as a companion document to this document.
   The format of this document parallels [RFC 3471].  It should be noted
   that the RSVP-TE specific version of Generalized MPLS includes RSVP
   specific support for rapid failure notification, see Section 4
   [RFC 3473].  For CR-LDP there is not currently a similar mechanism.
   When a failure is detected it will be propagated with
   RELEASE/WITHDRAW messages radially outward from the point of failure.
   Resources are to be released in this phase and actual resource
   information may be fed back to the source using a feedback
   mechanisms.

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC 2119].





Ashwood-Smith & Berger      Standards Track


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