Integrated Service Mappings on IEEE 802 Networks
RFC 2815

Document Type RFC - Proposed Standard (May 2000; No errata)
Last updated 2013-03-02
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Network Working Group                                          M. Seaman
Request for Comments: 2815                                       Telseon
Category: Standards Track                                       A. Smith
                                                        Extreme Networks
                                                              E. Crawley
                                                     Unisphere Solutions
                                                           J. Wroclawski
                                                                 MIT LCS
                                                                May 2000

            Integrated Service Mappings on IEEE 802 Networks

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 (2000).  All Rights Reserved.

Abstract

   This document describes mappings of IETF Integrated Services over
   LANs built from IEEE 802 network segments which may be interconnected
   by IEEE 802.1D MAC Bridges (switches).  It describes parameter
   mappings for supporting Controlled Load and Guaranteed Service using
   the inherent capabilities of relevant IEEE 802 technologies and, in
   particular, 802.1D-1998 queuing features in switches.

   These mappings are one component of the Integrated Services over IEEE
   802 LANs framework.

Seaman, et al.              Standards Track                     [Page 1]
RFC 2815         Int-Serv Mappings on IEEE 802 Networks         May 2000

Table of Contents

   1 Introduction ............................................... 2
   2 Flow Identification and Traffic Class Selection ............ 3
   3 Choosing a flow's IEEE 802 user_priority class ............. 5
   3.1 Context of admission control and delay bounds ............ 6
   3.2 Default service mappings ................................. 7
   3.3 Discussion ............................................... 9
   4 Computation of integrated services characterization parameters
        by IEEE 802 devices .....................................10
   4.1 General characterization parameters ......................10
   4.2 Parameters to implement Guaranteed Service ...............11
   4.3 Parameters to implement Controlled Load ..................11
   4.4 Parameters to implement Best Effort ......................12
   5 Merging of RSVP/SBM objects ................................12
   6 Applicability of these service mappings ....................13
   7 References .................................................14
   8 Security Considerations ....................................15
   9 Acknowledgments ............................................15
   10 Authors' Addresses ........................................16
   11 Full Copyright Statement ..................................17

1.  Introduction

   The IEEE 802.1 Interworking Task Group has developed a set of
   enhancements to the basic MAC Service provided in Bridged Local Area
   Networks (a.k.a. "switched LANs"). As a supplement to the original
   IEEE MAC Bridges standard, IEEE 802.1D-1990 [802.1D-ORIG], the
   updated IEEE 802.1D-1998 [802.1D] proposes differential traffic class
   queuing in switches. The IEEE 802.1Q specification [802.1Q] extends
   the capabilities of Ethernet/802.3 media to carry a traffic class
   indicator, or "user_priority" field, within data frames.

   The availability of this differential traffic queuing, together with
   additional mechanisms to provide admission control and signaling,
   allows IEEE 802 networks to support a close approximation of the IETF
   Integrated Services capabilities [CL][GS]. This document describes
   methods for mapping the service classes and parameters of the IETF
   model into IEEE 802.1D network parameters.  A companion document
   [SBM] describes a signaling protocol for use with these mappings.  It
   is recommended that readers be familiar with the overall framework in
   which these mappings and signaling protocol are expected to be used;
   this framework is described fully in [IS802FRAME].

   Within this document, Section 2 describes the method by which end
   systems and routers bordering the IEEE Layer-2 cloud learn what
   traffic class should be used for each data flow's packets.  Section 3
   describes the approach recommended to map IP-level traffic flows to

Seaman, et al.              Standards Track                     [Page 2]
RFC 2815         Int-Serv Mappings on IEEE 802 Networks         May 2000

   IEEE traffic classes within the Layer 2 network.  Section 4 describes
   the computation of Characterization Parameters by the layer 2
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