MPLS Forwarding Compliance and Performance Requirements
draft-villamizar-mpls-forwarding-01

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Document Type Active Internet-Draft (mpls WG)
Last updated 2013-03-16 (latest revision 2013-02-12)
Replaced by rfc7325, draft-ietf-mpls-forwarding
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MPLS                                                  C. Villamizar, Ed.
Internet-Draft                                                     OCCNC
Intended status: Informational                               K. Kompella
Expires: August 16, 2013                                Contrail Systems
                                                               S. Amante
                                            Level 3 Communications, Inc.
                                                                A. Malis
                                                                 Verizon
                                                            C. Pignataro
                                                                   Cisco
                                                       February 12, 2013

        MPLS Forwarding Compliance and Performance Requirements
                  draft-villamizar-mpls-forwarding-01

Abstract

   This document provides guidelines for implementors regarding MPLS
   forwarding and a basis for evaluations of forwarding implementations.
   Guidelines cover many aspects of MPLS forwarding.  Topics are
   highlighted where implementors might potentially overlook practical
   requirements which are unstated or underemphasized or are optional
   for conformance to RFCs.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 16, 2013.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal

Villamizar, et al.       Expires August 16, 2013                [Page 1]
Internet-Draft               MPLS Forwarding               February 2013

   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
     1.1.  Use of Requirements Language . . . . . . . . . . . . . . .  4
     1.2.  Apparent Misconceptions  . . . . . . . . . . . . . . . . .  4
     1.3.  Target Audience  . . . . . . . . . . . . . . . . . . . . .  5
   2.  Forwarding Issues  . . . . . . . . . . . . . . . . . . . . . .  6
     2.1.  Forwarding Basics  . . . . . . . . . . . . . . . . . . . .  6
       2.1.1.  MPLS Reserved Labels . . . . . . . . . . . . . . . . .  7
       2.1.2.  MPLS Differentiated Services . . . . . . . . . . . . .  7
       2.1.3.  Time Synchronization . . . . . . . . . . . . . . . . .  8
       2.1.4.  Uses of Multiple Label Stack Entries . . . . . . . . .  8
       2.1.5.  MPLS Link Bundling . . . . . . . . . . . . . . . . . .  9
       2.1.6.  MPLS Hierarchy . . . . . . . . . . . . . . . . . . . .  9
       2.1.7.  MPLS Fast Reroute (FRR)  . . . . . . . . . . . . . . . 10
       2.1.8.  Pseudowire Encapsulation . . . . . . . . . . . . . . . 10
         2.1.8.1.  Pseudowire Sequence Number . . . . . . . . . . . . 11
       2.1.9.  Layer-2 and Layer-3 VPN  . . . . . . . . . . . . . . . 12
     2.2.  MPLS Multicast . . . . . . . . . . . . . . . . . . . . . . 12
     2.3.  Packet Rates . . . . . . . . . . . . . . . . . . . . . . . 13
     2.4.  MPLS Multipath Techniques  . . . . . . . . . . . . . . . . 14
       2.4.1.  Pseudowire Control Word  . . . . . . . . . . . . . . . 15
       2.4.2.  Large Microflows . . . . . . . . . . . . . . . . . . . 16
       2.4.3.  Pseudowire Flow Label  . . . . . . . . . . . . . . . . 16
       2.4.4.  MPLS Entropy Label . . . . . . . . . . . . . . . . . . 16
       2.4.5.  Fields Used for Multipath  . . . . . . . . . . . . . . 17
         2.4.5.1.  MPLS Fields in Multipath . . . . . . . . . . . . . 17
         2.4.5.2.  IP Fields in Multipath . . . . . . . . . . . . . . 19
         2.4.5.3.  Fields Used in Flow Label  . . . . . . . . . . . . 20
         2.4.5.4.  Fields Used in Entropy Label . . . . . . . . . . . 20
     2.5.  MPLS-TP and UHP  . . . . . . . . . . . . . . . . . . . . . 21
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