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Constraint-Based LSP Setup using LDP (RFC3212)

IP.com Disclosure Number: IPCOM000006861D
Original Publication Date: 2002-Jan-01
Included in the Prior Art Database: 2002-Feb-07
Document File: 43 page(s) / 88K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

B. Jamoussi: AUTHOR [+5]

Abstract

This document specifies mechanisms and TLVs (Type/Length/Value) for support of CR-LSPs (constraint-based routed Label Switched Path) using LDP (Label Distribution Protocol).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 4% of the total text.

Network Working Group               B. Jamoussi, Editor, Nortel Networks

Request for Comments: 3212                       L. Andersson, Utfors AB

Category: Standards Track                    R. Callon, Juniper Networks

                                           R. Dantu, Netrake Corporation

                                                    L. Wu, Cisco Systems

                                         P. Doolan, OTB Consulting Corp.

                                                              T. Worster

                                                   N. Feldman, IBM Corp.

                                             A. Fredette, ANF Consulting

                                                M. Girish, Atoga Systems

                                                      E. Gray, Sandburst

                                        J. Heinanen, Song Networks, Inc.

                                      T. Kilty, Newbridge Networks, Inc.

                                               A. Malis, Vivace Networks

                                                            January 2002

                 Constraint-Based LSP Setup using LDP

Status of this Memo

   This document specifies an Internet standards track protocol for the

   Internet community, and requests discussion and suggestions for

   improvements.  Please refer to the current edition of the "Internet

   Official Protocol Standards" (STD 1) for the standardization state

   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   This document specifies mechanisms and TLVs (Type/Length/Value) for

   support of CR-LSPs (constraint-based routed Label Switched Path)

   using LDP (Label Distribution Protocol).

   This specification proposes an end-to-end setup mechanism of a CR-LSP

   initiated by the ingress LSR (Label Switching Router).  We also

   specify mechanisms to provide means for reservation of resources

   using LDP.

   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 [6].

Jamoussi, et al.            Standards Track                     [Page 1]

RFC 3212          Constraint-Based LSP Setup using LDP      January 2002

Table of Contents

   1. Introduction....................................................3

   2. Constraint-based Routing Overview...............................4

   2.1 Strict and Loose Explicit Routes...............................5

   2.2 Traffic Characteristics........................................5

   2.3 Preemption.....................................................5

   2.4 Route Pinning..................................................6

   2.5 Resource Class.................................................6

   3. Solution Overview...............................................6

   3.1 Required Messages and TLVs.....................................7

   3.2 Label Request Message..........................................7

   3.3 Label Mapping Message..........................................9

   3.4 Notification Message..........................................10

   3.5 Release , Withdraw, and Abort Messages........................11

   4. Protocol Specification.........................................11

   4.1 Explicit Route TLV (ER-TLV)...................................11

   4.2 Explicit Route Hop TLV (ER-Hop TLV)...........................12

   4.3 Traffic Parameters TLV........................................13

   4.3.1 Semantics...................................................15

   4.3.1.1 Frequency.................................................15

   4.3.1.2 Peak Rate.............................