BFD for Multipoint Networks
draft-ietf-bfd-multipoint-18

Document Type Active Internet-Draft (bfd WG)
Last updated 2018-06-19 (latest revision 2018-06-18)
Replaces draft-katz-ward-bfd-multipoint
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication (wg milestone: Apr 2016 - Submit the the docum... )
Document shepherd Reshad Rahman
Shepherd write-up Show (last changed 2018-03-05)
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Telechat date On agenda of 2018-07-05 IESG telechat
Needs 9 more YES or NO OBJECTION positions to pass.
Responsible AD Martin Vigoureux
Send notices to Reshad Rahman <rrahman@cisco.com>
IANA IANA review state IANA OK - No Actions Needed
IANA action state None
Internet Engineering Task Force                                  D. Katz
Internet-Draft                                          Juniper Networks
Updates: 5880 (if approved)                                      D. Ward
Intended status: Standards Track                           Cisco Systems
Expires: December 20, 2018                            S. Pallagatti, Ed.
                                                  Individual contributor
                                                          G. Mirsky, Ed.
                                                               ZTE Corp.
                                                           June 18, 2018

                      BFD for Multipoint Networks
                      draft-ietf-bfd-multipoint-18

Abstract

   This document describes extensions to the Bidirectional Forwarding
   Detection (BFD) protocol for its use in multipoint and multicast
   networks.

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 December 20, 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

Katz, et al.            Expires December 20, 2018               [Page 1]
Internet-Draft         BFD for Multipoint Networks             June 2018

   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  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Keywords  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Goals . . . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Protocol Details  . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Multipoint BFD Control Packets  . . . . . . . . . . . . .   5
     5.2.  Session Model . . . . . . . . . . . . . . . . . . . . . .   5
     5.3.  Session Failure Semantics . . . . . . . . . . . . . . . .   5
     5.4.  State Variables . . . . . . . . . . . . . . . . . . . . .   5
       5.4.1.  New State Variable Values . . . . . . . . . . . . . .   6
       5.4.2.  State Variable Initialization and Maintenance . . . .   6
     5.5.  State Machine . . . . . . . . . . . . . . . . . . . . . .   6
     5.6.  Session Establishment . . . . . . . . . . . . . . . . . .   7
     5.7.  Discriminators and Packet Demultiplexing  . . . . . . . .   7
     5.8.  Packet consumption on tails . . . . . . . . . . . . . . .   8
     5.9.  Bringing Up and Shutting Down Multipoint BFD Service  . .   8
     5.10. Timer Manipulation  . . . . . . . . . . . . . . . . . . .   9
     5.11. Detection Times . . . . . . . . . . . . . . . . . . . . .   9
     5.12. State Maintenance for Down/AdminDown Sessions . . . . . .  10
       5.12.1.  MultipointHead Sessions  . . . . . . . . . . . . . .  10
       5.12.2.  MultipointTail Sessions  . . . . . . . . . . . . . .  10
     5.13. Base Specification Text Replacement . . . . . . . . . . .  10
       5.13.1.  Reception of BFD Control Packets . . . . . . . . . .  11
       5.13.2.  Demultiplexing BFD Control Packets . . . . . . . . .  13
       5.13.3.  Transmitting BFD Control Packets . . . . . . . . . .  14
   6.  Assumptions . . . . . . . . . . . . . . . . . . . . . . . . .  17
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
   9.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .  18
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  18
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  18
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  18
     11.2.  Informational References . . . . . . . . . . . . . . . .  19
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  19

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