BGP based Multi-homing in Virtual Private LAN Service
draft-ietf-bess-vpls-multihoming-02

Document Type Active Internet-Draft (bess WG)
Last updated 2018-09-14
Replaces draft-ietf-l2vpn-vpls-multihoming
Stream IETF
Intended RFC status Proposed Standard
Formats plain text pdf html bibtex
Stream WG state In WG Last Call
Document shepherd Matthew Bocci
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to Matthew Bocci <matthew.bocci@nokia.com>
Network Working Group                                         B. Kothari
Internet-Draft                                          Augtera Networks
Updates: 4761 (if approved)                                  K. Kompella
Intended status: Standards Track                        Juniper Networks
Expires: March 16, 2019                                    W. Henderickx
                                                                   Nokia
                                                                F. Balus
                                                                   Cisco
                                                               J. Uttaro
                                                                    AT&T
                                                            Sep 12, 2018

         BGP based Multi-homing in Virtual Private LAN Service
                draft-ietf-bess-vpls-multihoming-02.txt

Abstract

   Virtual Private LAN Service (VPLS) is a Layer 2 Virtual Private
   Network (VPN) that gives its customers the appearance that their
   sites are connected via a Local Area Network (LAN).  It is often
   required for the Service Provider (SP) to give the customer redundant
   connectivity to some sites, often called "multi-homing".  This memo
   shows how BGP-based multi-homing can be offered in the context of LDP
   and BGP VPLS solutions.

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
   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 March 16, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Kothari, et al.          Expires March 16, 2019                 [Page 1]
Internet-Draft              VPLS Multi-homing                   Sep 2018

   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.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  General Terminology . . . . . . . . . . . . . . . . . . .   3
     1.2.  Conventions . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Scenarios . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  VPLS Multi-homing Considerations  . . . . . . . . . . . .   5
   3.  Multi-homing Operation  . . . . . . . . . . . . . . . . . . .   6
     3.1.  Customer Edge (CE) NLRI . . . . . . . . . . . . . . . . .   6
     3.2.  Deployment Considerations . . . . . . . . . . . . . . . .   7
     3.3.  Designated Forwarder Election . . . . . . . . . . . . . .   8
       3.3.1.  Attributes  . . . . . . . . . . . . . . . . . . . . .   8
       3.3.2.  Variables Used  . . . . . . . . . . . . . . . . . . .   9
       3.3.3.  Election Procedures . . . . . . . . . . . . . . . . .  11
     3.4.  DF Election on PEs  . . . . . . . . . . . . . . . . . . .  12
     3.5.  Pseudowire and Site-ID Binding Properties . . . . . . . .  13
   4.  Multi-AS VPLS . . . . . . . . . . . . . . . . . . . . . . . .  13
     4.1.  Route Origin Extended Community . . . . . . . . . . . . .  13
     4.2.  VPLS Preference . . . . . . . . . . . . . . . . . . . . .  13
     4.3.  Use of BGP attributes in Inter-AS Methods . . . . . . . .  14
       4.3.1.  Inter-AS Method (b): EBGP Redistribution of VPLS
               Information between ASBRs . . . . . . . . . . . . . .  15
       4.3.2.  Inter-AS Method (c): Multi-Hop EBGP Redistribution of
               VPLS       Information between ASes . . . . . . . . .  16
   5.  MAC Flush Operations  . . . . . . . . . . . . . . . . . . . .  16
     5.1.  MAC Flush Indicators  . . . . . . . . . . . . . . . . . .  16
     5.2.  Minimizing the effects of fast link transitions . . . . .  17
   6.  Backwards Compatibility . . . . . . . . . . . . . . . . . . .  17
     6.1.  BGP based VPLS  . . . . . . . . . . . . . . . . . . . . .  18
Show full document text