Seamless Bidirectional Forwarding Detection (BFD) Use Case
draft-aldrin-bfd-seamless-use-case-00

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Last updated 2014-02-04
Replaced by draft-ietf-bfd-seamless-use-case, rfc7882
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INTERNET-DRAFT                                                Sam Aldrin
Intended Status: Informational                                  (Huawei)
Expires: August 7, 2014                                     Manav Bhatia
                                                        (Alcatel-Lucent)
                                                             Greg Mirsky
                                                              (Ericsson)
                                                          Nagendra Kumar
                                                                 (Cisco)
                                                       Satoru Matsushima
                                                              (Softbank)

                                                        February 3, 2014

      Seamless Bidirectional Forwarding Detection (BFD) Use Case 
                 draft-aldrin-bfd-seamless-use-case-00

Abstract

   This document provides various use cases for Bidirectional Forwarding
   Detection (BFD) such that simplified solution and extensions could be
   developed for detecting forwarding failures.

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Copyright and License Notice
 

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   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
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   described in the Simplified BSD License.

Table of Contents

   1  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1  Terminology . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.2  Contributors  . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Introduction to Seamless BFD . . . . . . . . . . . . . . . . .  4
   3. Use cases . . . . . . . . . . . . . . . . . . . . . . . . . . .  4
     3.1. Unidirectional forwarding path Validation . . . . . . . . .  5
     3.2. Validation of forwarding path prior to traffic switching  .  5
     3.3. Centralized Traffic Engineering . . . . . . . . . . . . . .  6
     3.4. BFD in Centralized Segment Routing  . . . . . . . . . . . .  6
     3.5. BFD to Efficiently Operate under Resource Constraints . . .  7
     3.6. BFD for Anycast Address . . . . . . . . . . . . . . . . . .  7
     3.7. BFD Fault Isolation . . . . . . . . . . . . . . . . . . . .  7
     3.8. Multiple BFD Sessions to Same Target  . . . . . . . . . . .  7
   4  Security Considerations . . . . . . . . . . . . . . . . . . . .  9
   5   IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  9
   6  References  . . . . . . . . . . . . . . . . . . . . . . . . . .  9
     6.1  Normative References  . . . . . . . . . . . . . . . . . . .  9
     6.2  Informative References  . . . . . . . . . . . . . . . . . .  9
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . .  9

 

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1  Introduction

   Bidirectional Forwarding Detection (BFD) is a light weight protocol,
   as defined in [RFC5880], used to detect forwarding failures. Various
   protocols and applications rely on BFD for failure detection. Even
   though the protocol is simple and light weight, there are certain use
   cases, where a much faster setting up of sessions and continuity
   check of the data forwarding paths is necessary. This document
   identifies those use cases such that if necessary enhancements could
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