BFD Stability
draft-ashesh-bfd-stability-01

The information below is for an old version of the document
Document Type Active Internet-Draft (individual)
Last updated 2014-10-21
Replaced by draft-ietf-bfd-stability
Stream (None)
Intended RFC status (None)
Formats pdf htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
Routing Working Group                                          A. Mishra
Internet-Draft                                           M. Jethanandani
Intended status: Standards Track                               A. Saxena
Expires: April 23, 2015                                Ciena Corporation
                                                           S. Pallagatti
                                                        Juniper Networks
                                                                 M. Chen
                                                                  Huawei
                                                        October 20, 2014

                             BFD Stability
                   draft-ashesh-bfd-stability-01.txt

Abstract

   This document describes extensions to the Bidirectional Forwarding
   Detection (BFD) protocol to measure BFD stability.  Specifically, it
   describes a mechanism for detection of BFD frame loss.

Requirements Language

   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 <xref
   target="RFC2119">RFC 2119</xref>.

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 http://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 April 23, 2015.

Mishra, et al.           Expires April 23, 2015                 [Page 1]
Internet-Draft                BFD Stability                 October 2014

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
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  BFD Null-Authentication TLV . . . . . . . . . . . . . . . . .   2
   3.  Theory of Operations  . . . . . . . . . . . . . . . . . . . .   3
   4.  IANA Requirements . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Security Consideration  . . . . . . . . . . . . . . . . . . .   4
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   7.  Normative References  . . . . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   The Bidirectional Forwarding Detection (BFD) protocol operates by
   transmitting and receiving control frames, generally at high
   frequency, over the datapath being monitored.  In order to prevent
   significant data loss due to a datapath failure, the tolerance for
   lost or delayed frames (the Detection Time as described in RFC 5880)
   is set to the smallest feasible value.

   This document proposes a mechanism to detect lost frames in a BFD
   session in addition to the datapath fault detection mechanisms of
   BFD.  Such a mechanism presents significant value with the ability to
   measure the stability of BFD sessions and provides data to the
   operators.

2.  BFD Null-Authentication TLV

   The functionality proposed for BFD stability measurement is achieved
   by appending the Null-Authentication TLV to the BFD control frame.

   The Null-Authentication TLV (called 0-Auth in this document) extends
   the existing BFD Authentication TLV structure by adding a new Auth-

Mishra, et al.           Expires April 23, 2015                 [Page 2]
Internet-Draft                BFD Stability                 October 2014

   Type of <IANA Assigned>.  This TLV carries the Sequence Number for
   frame loss measurement.

       0                   1                   2                   3
       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
      |   Auth Type   |   Auth Len    |  Auth Key ID  |   Reserved    |
      +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Show full document text