Preference-based EVPN DF Election
draft-ietf-bess-evpn-pref-df-02

Document Type Active Internet-Draft (bess WG)
Last updated 2018-10-22
Replaces draft-rabadan-bess-evpn-pref-df
Stream IETF
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state I-D Exists
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to (None)
BESS Workgroup                                           J. Rabadan, Ed.
Internet Draft                                              S. Sathappan
Intended status: Standards Track                                   Nokia

S. Boutros                                                 T. Przygienda
Individual                                                        W. Lin
                                                                J. Drake
                                                        Juniper Networks

                                                              A. Sajassi
                                                              S. Mohanty
                                                           Cisco Systems

Expires: April 25, 2019                                 October 22, 2018

                   Preference-based EVPN DF Election
                    draft-ietf-bess-evpn-pref-df-02

Abstract

   The Designated Forwarder (DF) in (PBB-)EVPN networks is defined as
   the PE responsible for sending broadcast, multicast and unknown
   unicast traffic (BUM) to a multi-homed device/network in the case of
   an all-active multi-homing ES, or BUM and unicast in the case of
   single-active multi-homing.

   The DF is selected out of a candidate list of PEs that advertise the
   Ethernet Segment Identifier (ESI) to the EVPN network, according to
   the Default DF Election algorithm. 

   While the Default Algorithm provides an efficient and automated way
   of selecting the DF across different EVIs or ISIDs in the ES, there
   are some use-cases where a more 'deterministic' and user-controlled
   method is required. At the same time, Service Providers require an
   easy way to force an on-demand DF switchover in order to carry out
   some maintenance tasks on the existing DF or control whether a new
   active PE can preempt the existing DF PE. 

   This document proposes an extension to the Default DF election
   procedures so that the above requirements can be met.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
 

Rabadan et al.           Expires April 25, 2019                 [Page 1]
Internet-Draft     Preference-based EVPN DF Election    October 22, 2018

   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
   other groups may also distribute working documents as Internet-
   Drafts.

   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."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html

   This Internet-Draft will expire on April 25, 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
   (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. Problem Statement . . . . . . . . . . . . . . . . . . . . . . .  3
   2. Solution requirements . . . . . . . . . . . . . . . . . . . . .  3
   3. EVPN BGP Attributes for Deterministic DF Election . . . . . . .  4
   4. Solution description  . . . . . . . . . . . . . . . . . . . . .  5
     4.1 Use of the Preference algorithm  . . . . . . . . . . . . . .  6
     4.2 Use of the Preference algorithm in [RFC7432]
         Ethernet-Segments  . . . . . . . . . . . . . . . . . . . . .  7
     4.3 The Non-Revertive option . . . . . . . . . . . . . . . . . .  8
   5. Conventions used in this document . . . . . . . . . . . . . . . 11
 

Rabadan et al.           Expires April 25, 2019                 [Page 2]
Internet-Draft     Preference-based EVPN DF Election    October 22, 2018

   6. Security Considerations . . . . . . . . . . . . . . . . . . . . 11
   7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 11
   8. References  . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     8.1 Normative References . . . . . . . . . . . . . . . . . . . . 11
     8.2 Informative References . . . . . . . . . . . . . . . . . . . 11
Show full document text