Preference-based EVPN DF Election
draft-ietf-bess-evpn-pref-df-00

Document Type Active Internet-Draft (bess WG)
Last updated 2017-06-21
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
VMware                                                            W. Lin
                                                                J. Drake
                                                        Juniper Networks

                                                              A. Sajassi
                                                              S. Mohanty
                                                           Cisco Systems

Expires: December 23, 2017                                 June 21, 2017

                   Preference-based EVPN DF Election
                    draft-ietf-bess-evpn-pref-df-00

Abstract

   RFC7432 defines the Designated Forwarder (DF) in (PBB-)EVPN networks
   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 'service-carving' algorithm. 

   While 'service-carving' 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 current RFC7432 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 December 23, 2017                [Page 1]
Internet-Draft     Preference-based EVPN DF Election       June 21, 2017

   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 December 23, 2017.

Copyright Notice

   Copyright (c) 2017 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  . . . . . . . . . . . . . .  5
     4.2 Use of the Preference algorithm in RFC7432
         Ethernet-Segments  . . . . . . . . . . . . . . . . . . . . .  7
     4.3 The Non-Revertive option . . . . . . . . . . . . . . . . . .  7
   5. Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . 10
 

Rabadan et al.         Expires December 23, 2017                [Page 2]
Internet-Draft     Preference-based EVPN DF Election       June 21, 2017

   11. Conventions used in this document  . . . . . . . . . . . . . . 10
   12. Security Considerations  . . . . . . . . . . . . . . . . . . . 11
   13. IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 11
Show full document text