datatracker.ietf.org
Sign in
Version 5.3.0, 2014-04-12
Report a bug

BFD for Multipoint Networks
draft-ietf-bfd-multipoint-03

Document type: Active Internet-Draft (bfd WG)
Document stream: IETF
Last updated: 2014-04-01 (latest revision 2014-02-18)
Intended RFC status: Proposed Standard
Other versions: plain text, pdf, html

IETF State: WG Document Jun 2014
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: I-D Exists
Responsible AD: (None)
Send notices to: No addresses provided

Network Working Group                                           D. Katz
Internet Draft                                         Juniper Networks
Intended status: Proposed Standard                              D. Ward
                                                                  Cisco

Expires: August, 2014                                   February 4, 2014

                      BFD for Multipoint Networks
                    draft-ietf-bfd-multipoint-03.txt

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
   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/1id-abstracts.html

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

Copyright Notice

   Copyright (c) 2014 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

Katz, Ward                                                      [Page 1]
Internet Draft         BFD for Multipoint Networks        February, 2014

   described in the Simplified BSD License.

Abstract

   This document describes extensions to the Bidirectional Forwarding
   Detection (BFD) protocol for its use in multipoint and multicast
   networks.  Comments on this draft should be directed to
   rtg-bfd@ietf.org.

Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC-2119 [KEYWORDS].

Table of Contents

    1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
    2. Goals  . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
    3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
    4. Protocol Details . . . . . . . . . . . . . . . . . . . . . . . 6
       4.1 Multipoint BFD Control Packets . . . . . . . . . . . . . . 6
       4.2 Session Model  . . . . . . . . . . . . . . . . . . . . . . 6
       4.3 Session Failure Semantics  . . . . . . . . . . . . . . . . 7
       4.4 State Variables  . . . . . . . . . . . . . . . . . . . . . 7
          4.4.1 New State Variables . . . . . . . . . . . . . . . . . 7
          4.4.2 State Variable Initialization and Maintenance . . . . 9
       4.5 Controlling Multipoint BFD Options . . . . . . . . . . .  10
       4.6 State Machine . . . . . . . . . . . . . . . . .. . . . .  10
       4.7 Session Establishment  . . . . . . . . . . . . . . . . .  11
       4.8 Discriminators and Packet Demultiplexing . . . . . . . .  12
       4.9 Controlling Tail Packet Transmission . . . . . . . . . .  12
       4.10 Bringing Up and Shutting Down Multipoint BFD Service  .  13
       4.11 Soliciting the Tails  . . . . . . . . . . . . . . . . .  14
       4.12 Verifying Connectivity to Specific Tails  . . . . . . .  14
       4.13 Timer Manipulation  . . . . . . . . . . . . . . . . . .  15
       4.14 Detection Times . . . . . . . . . . . . . . . . . . . .  15
       4.15 State Maintenance for Down/AdminDown Sessions . . . . .  16
           4.15.1 MultipointHead Sessions . . . . . . . . . . . . .  16
           4.15.2 MultipointTail Sessions . . . . . . . . . . . . .  16
           4.15.3 MultipointClient Sessions . . . . . . . . . . . .  17
       4.16 Base Specification Text Replacement . . . . . . . . . .  17
           4.16.1 Reception of BFD Control Packets  . . . . . . . .  17

Katz, Ward                                                      [Page 2]
Internet Draft         BFD for Multipoint Networks        February, 2014

           4.16.2 Demultiplexing of BFD Control Packets . . . . . .  20

[include full document text]