MVPN/EVPN Tunnel Aggregation with Common Labels
draft-zzhang-bess-mvpn-evpn-aggregation-label-01

Document Type Active Internet-Draft (individual)
Last updated 2018-04-27
Stream (None)
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
BESS                                                            Z. Zhang
Internet-Draft                                                  E. Rosen
Updates: 7432, 6514, 7582 (if approved)                           W. Lin
Intended status: Standards Track                        Juniper Networks
Expires: October 29, 2018                                          Z. Li
                                                     Huawei Technologies
                                                             I. Wijnands
                                                           Cisco Systems
                                                          April 27, 2018

            MVPN/EVPN Tunnel Aggregation with Common Labels
            draft-zzhang-bess-mvpn-evpn-aggregation-label-01

Abstract

   The MVPN specifications allow a single Point-to-Multipoint (P2MP)
   tunnel to carry traffic of multiple VPNs.  The EVPN specifications
   allow a single P2MP tunnel to carry traffic of multiple Broadcast
   Domains (BDs).  These features require the ingress router of the P2MP
   tunnel to allocate an upstream-assigned MPLS label for each VPN or
   for each BD.  A packet sent on a P2MP tunnel then carries the label
   that is mapped to its VPN or BD.  (In some cases, a distinct
   upstream-assigned is needed for each flow.)  Since each ingress
   router allocates labels independently, with no coordination among the
   ingress routers, the egress routers may need to keep track of a large
   number of labels.  The number of labels may need to be as large (or
   larger) than the product of the number of ingress routers times the
   number of VPNs or BDs.  However, the number of labels can be greatly
   reduced if the association between a label and a VPN or BD is made by
   provisioning, so that all ingress routers assign the same label to a
   particular VPN or BD.  New procedures are needed in order to take
   advantage of such provisioned labels.  These new procedures also
   apply to Multipoint-to-Multipoint (MP2MP) tunnels.  This document
   updates RFCs 6514, 7432 and 7582 by specifying the necessary
   procedures.

Requirements Language

   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 RFC2119.

Status of This Memo

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

Zhang, et al.           Expires October 29, 2018                [Page 1]
Internet-Draft         mvpn-evpn-aggregation-label            April 2018

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://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 October 29, 2018.

Copyright Notice

   Copyright (c) 2018 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
   Provisions Relating to IETF Documents
   (https://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.  Terminologies . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Problem Description . . . . . . . . . . . . . . . . . . .   4
     2.2.  Proposed Solution . . . . . . . . . . . . . . . . . . . .   5
       2.2.1.  MP2MP Tunnels . . . . . . . . . . . . . . . . . . . .   6
       2.2.2.  Segmented Tunnels . . . . . . . . . . . . . . . . . .   6
       2.2.3.  Summary of Label Allocation Methods . . . . . . . . .   8
   3.  Specification . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.1.  Context Label Space ID Extended Community . . . . . . . .   9
     3.2.  Procedures  . . . . . . . . . . . . . . . . . . . . . . .  10
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   6.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  11
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
Show full document text