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Multi-Protocol Label Switching (MPLS) Support of Differentiated Services (RFC3270)

IP.com Disclosure Number: IPCOM000008110D
Original Publication Date: 2002-May-01
Included in the Prior Art Database: 2002-May-20

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

F. Le Faucheur: AUTHOR [+8]

Abstract

This document defines a flexible solution for support of Differentiated Services (Diff-Serv) over Multi-Protocol Label Switching (MPLS) networks.

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Network Working Group                             F. Le Faucheur, Editor

Request for Comments: 3270                                         L. Wu

Category: Standards Track                                       B. Davie

                                                           Cisco Systems

                                                               S. Davari

                                                         PMC-Sierra Inc.

                                                             P. Vaananen

                                                                   Nokia

                                                             R. Krishnan

                                                       Axiowave Networks

                                                               P. Cheval

                                                                 Alcatel

                                                             J. Heinanen

                                                           Song Networks

                                                                May 2002

                 Multi-Protocol Label Switching (MPLS)

                   Support of Differentiated Services

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 defines a flexible solution for support of

   Differentiated Services (Diff-Serv) over Multi-Protocol Label

   Switching (MPLS) networks.

   This solution allows the MPLS network administrator to select how

   Diff-Serv Behavior Aggregates (BAs) are mapped onto Label Switched

   Paths (LSPs) so that he/she can best match the Diff-Serv, Traffic

   Engineering and protection objectives within his/her particular

   network.  For instance, this solution allows the network

   administrator to decide whether different sets of BAs are to be

   mapped onto the same LSP or mapped onto separate LSPs.

Le Faucheur, et. al.        Standards Track                     [Page 1]

RFC 3270        MPLS Support of Differentiated Services         May 2002

Table of Contents

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

   1.1  Terminology. . . . . . . . . . . . . . . . . . . . . . . . . . 5

   1.2 EXP-Inferred-PSC LSPs (E-LSP) . . . . . . . . . . . . . . . . . 6

   1.3 Label-Only-Inferred-PSC LSPs (L-LSP). . . . . . . . . . . . . . 7

   1.4 Overall Operations. . . . . . . . . . . . . . . . . . . . . . . 7

   1.5 Relationship between Label and FEC. . . . . . . . . . . . . . . 8

   1.6 Bandwidth Reservation for E-LSPs and L-LSPs . . . . . . . . . . 8

   2. Label Forwarding Model for Diff-Serv LSRs and Tunneling Models . 9

   2.1 Label Forwarding Model for Diff-Serv LSRs . . . . . . . . . . . 9

   2.2 Incoming PHB Determination. . . . . . . . . . . . . . . . . . .10

   2.3 Outgoing PHB Determination With Optional Traffic Conditioning .11

   2.4 Label Forwarding. . . . . . . . . . . . . . . . . . . . . . . .11

   2.5 Encoding Diff-Serv Information Into Encapsulation Layer . . . .13

   2.6 Diff-Serv Tunneling Models over MPLS. . . . . . . . . . . . . .13

   3. Detailed Operations of E-LSPs. . . . . . . . . . . . . . . . . .22

   3.1 E-LSP Definition. . . . . . . . . . . . . . . . . . . . . . . .22

   3.2 Populating the `Encaps-->PHB mapping' for an incoming E-LSP . .23

   3.3 Incoming PHB Determination On Incoming E-LSP. . . . . . . . . .23

   3.4 Populating the `Set of PHB-->Encaps mappings' for an outgoing

       E-LSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

   3.5 Encoding Diff-Serv information into Encapsulation Layer On

       Outgoing E-LSP. . . . . . . . . . . . . . . . . . . . . . . . ....