Applicability of the Babel routing protocol
draft-ietf-babel-applicability-01

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Last updated 2017-01-09 (latest revision 2017-01-05)
Replaces draft-chroboczek-babel-applicability
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Network Working Group                                      J. Chroboczek
Internet-Draft                         IRIF, University of Paris-Diderot
Intended status: Informational                           January 5, 2017
Expires: July 9, 2017

              Applicability of the Babel routing protocol
                   draft-ietf-babel-applicability-01

Abstract

   This document describes some application areas where the Babel
   routing protocol (RFC 6126) has been found to be useful.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on July 9, 2017.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Existing successful deployments of Babel  . . . . . . . . . .   2
     2.1.  Hybrid networks . . . . . . . . . . . . . . . . . . . . .   2
     2.2.  Large scale overlay networks  . . . . . . . . . . . . . .   2
     2.3.  Pure mesh networks  . . . . . . . . . . . . . . . . . . .   3
     2.4.  Small unmanaged networks  . . . . . . . . . . . . . . . .   3
   3.  Application Areas where Babel is not recommended  . . . . . .   3
     3.1.  Large, stable networks  . . . . . . . . . . . . . . . . .   3
     3.2.  Low-power and constrained networks  . . . . . . . . . . .   3
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   6.  Informational References  . . . . . . . . . . . . . . . . . .   4
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   Babel [RFC6126] is a loop-avoiding distance-vector routing protocol
   that aims to be robust in a variety of environments.

   This document describes a few areas where Babel has been found to be
   useful.  It is structured as follows.  In Section 2, we describe
   application areas where Babel has been successfully deployed, and in
   Section 3, we describe application areas where deployment of Babel is
   not encouraged because better alternatives are available.

2.  Existing successful deployments of Babel

2.1.  Hybrid networks

   Babel is able to deal with both classical, prefix-based ("Internet-
   style") routing and flat ("mesh-style") routing over non-transitive
   link technologies.  Because of that, it has seen a number of
   succesful deployments in medium-sized hybrid networks, networks that
   combine a wired, aggregated backbone with meshy wireless bits at the
   edges.  No other routing protocol known to us is similarly robust and
   efficient in this particular type of network.

2.2.  Large scale overlay networks

   The algorithms used by Babel (loop avoidance, hysteresis, delayed
   updates) allow it to remain stable and efficient in the presence of
   unstable metrics, even in the presence of a feedback loop.  For this
   reason, it has been successfully deployed in large scale overlay
   networks, built out of thousands of tunnels spanning continents,
   where it is used with a metric computed from links' latencies
   [DELAY-BASED].

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