Network Transport Circuit Breakers
draft-ietf-tsvwg-circuit-breaker-15

Document Type Active Internet-Draft (tsvwg WG)
Last updated 2017-01-18 (latest revision 2016-04-04)
Replaces draft-fairhurst-tsvwg-circuit-breaker
Stream IETF
Intended RFC status Best Current Practice
Formats plain text xml pdf html bibtex
Reviews
Stream WG state Submitted to IESG for Publication Dec 2015
Document shepherd David Black
Shepherd write-up Show (last changed 2015-09-28)
IESG IESG state RFC Ed Queue
Consensus Boilerplate Yes
Telechat date
Responsible AD Spencer Dawkins
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state No IC
RFC Editor RFC Editor state AUTH48
TSVWG Working Group                                         G. Fairhurst
Internet-Draft                                    University of Aberdeen
Intended status: Best Current Practice                    April 04, 2016
Expires: October 6, 2016

                   Network Transport Circuit Breakers
                  draft-ietf-tsvwg-circuit-breaker-15

Abstract

   This document explains what is meant by the term "network transport
   Circuit Breaker" (CB).  It describes the need for circuit breakers
   for network tunnels and applications when using non-congestion-
   controlled traffic, and explains where circuit breakers are, and are
   not, needed.  It also defines requirements for building a circuit
   breaker and the expected outcomes of using a circuit breaker within
   the Internet.

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 October 6, 2016.

Copyright Notice

   Copyright (c) 2016 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

Fairhurst                Expires October 6, 2016                [Page 1]
Internet-Draft                                                April 2016

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Types of Circuit Breaker  . . . . . . . . . . . . . . . .   6
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Design of a Circuit-Breaker (What makes a good circuit
       breaker?) . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Functional Components . . . . . . . . . . . . . . . . . .   7
     3.2.  Other network topologies  . . . . . . . . . . . . . . . .  10
       3.2.1.  Use with a multicast control/routing protocol . . . .  10
       3.2.2.  Use with control protocols supporting pre-provisioned
               capacity  . . . . . . . . . . . . . . . . . . . . . .  11
       3.2.3.  Unidirectional Circuit Breakers over Controlled Paths  12
   4.  Requirements for a Network Transport Circuit Breaker  . . . .  12
   5.  Examples of Circuit Breakers  . . . . . . . . . . . . . . . .  15
     5.1.  A Fast-Trip Circuit Breaker . . . . . . . . . . . . . . .  15
       5.1.1.  A Fast-Trip Circuit Breaker for RTP . . . . . . . . .  16
     5.2.  A Slow-trip Circuit Breaker . . . . . . . . . . . . . . .  17
     5.3.  A Managed Circuit Breaker . . . . . . . . . . . . . . . .  17
       5.3.1.  A Managed Circuit Breaker for SAToP Pseudo-Wires  . .  17
       5.3.2.  A Managed Circuit Breaker for Pseudowires (PWs) . . .  18
   6.  Examples where circuit breakers may not be needed.  . . . . .  19
     6.1.  CBs over pre-provisioned Capacity . . . . . . . . . . . .  19
     6.2.  CBs with tunnels carrying Congestion-Controlled Traffic .  19
     6.3.  CBs with Uni-directional Traffic and no Control Path  . .  20
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  20
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  22
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  22
   10. Revision Notes  . . . . . . . . . . . . . . . . . . . . . . .  22
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  25
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  25
     11.2.  Informative References . . . . . . . . . . . . . . . . .  25
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  27

1.  Introduction

   The term "Circuit Breaker" originates in electricity supply, and has
   nothing to do with network circuits or virtual circuits.  In
Show full document text