Ethernet-Tree (E-Tree) Support in Ethernet VPN (EVPN) and Provider Backbone Bridging EVPN (PBB-EVPN)
RFC 8317

Document Type RFC - Proposed Standard (January 2018; No errata)
Updates RFC 7385
Last updated 2018-01-31
Replaces draft-sajassi-bess-evpn-etree
Stream IETF
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Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Thomas Morin
Shepherd write-up Show (last changed 2017-01-17)
IESG IESG state RFC 8317 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Alvaro Retana
Send notices to "Thomas Morin" <thomas.morin@orange.com>, aretana.ietf@gmail.com
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                   A. Sajassi, Ed.
Request for Comments: 8317                                      S. Salam
Updates: 7385                                                      Cisco
Category: Standards Track                                       J. Drake
ISSN: 2070-1721                                                  Juniper
                                                               J. Uttaro
                                                                     ATT
                                                              S. Boutros
                                                                  VMware
                                                              J. Rabadan
                                                                   Nokia
                                                            January 2018

       Ethernet-Tree (E-Tree) Support in Ethernet VPN (EVPN) and
               Provider Backbone Bridging EVPN (PBB-EVPN)

Abstract

   The MEF Forum (MEF) has defined a rooted-multipoint Ethernet service
   known as Ethernet-Tree (E-Tree).  A solution framework for supporting
   this service in MPLS networks is described in RFC 7387, "A Framework
   for Ethernet-Tree (E-Tree) Service over a Multiprotocol Label
   Switching (MPLS) Network".  This document discusses how those
   functional requirements can be met with a solution based on RFC 7432,
   "BGP MPLS Based Ethernet VPN (EVPN)", with some extensions and a
   description of how such a solution can offer a more efficient
   implementation of these functions than that of RFC 7796,
   "Ethernet-Tree (E-Tree) Support in Virtual Private LAN Service
   (VPLS)".  This document makes use of the most significant bit of the
   Tunnel Type field (in the P-Multicast Service Interface (PMSI) Tunnel
   attribute) governed by the IANA registry created by RFC 7385; hence,
   it updates RFC 7385 accordingly.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8317.

Sajassi, et al.              Standards Track                    [Page 1]
RFC 8317           E-Tree Support in EVPN and PBB-EVPN      January 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.

Sajassi, et al.              Standards Track                    [Page 2]
RFC 8317           E-Tree Support in EVPN and PBB-EVPN      January 2018

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Specification of Requirements . . . . . . . . . . . . . .   5
     2.2.  Terms and Abbreviations . . . . . . . . . . . . . . . . .   5
   3.  E-Tree Scenarios  . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Scenario 1: Leaf or Root Site(s) per PE . . . . . . . . .   6
     3.2.  Scenario 2: Leaf or Root Site(s) per AC . . . . . . . . .   7
     3.3.  Scenario 3: Leaf or Root Site(s) per MAC Address  . . . .   8
   4.  Operation for EVPN  . . . . . . . . . . . . . . . . . . . . .   9
     4.1.  Known Unicast Traffic . . . . . . . . . . . . . . . . . .   9
     4.2.  BUM Traffic . . . . . . . . . . . . . . . . . . . . . . .  10
       4.2.1.  BUM Traffic Originated from a Single-Homed Site on a
               Leaf AC . . . . . . . . . . . . . . . . . . . . . . .  11
       4.2.2.  BUM Traffic Originated from a Single-Homed Site on a
               Root AC . . . . . . . . . . . . . . . . . . . . . . .  11
       4.2.3.  BUM Traffic Originated from a Multihomed Site on a
               Leaf AC . . . . . . . . . . . . . . . . . . . . . . .  12
       4.2.4.  BUM Traffic Originated from a Multihomed Site on a
               Root AC . . . . . . . . . . . . . . . . . . . . . . .  12
     4.3.  E-Tree Traffic Flows for EVPN . . . . . . . . . . . . . .  12
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