Terminology for Benchmarking Link-State IGP Data-Plane Route Convergence
RFC 6412

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Internet Engineering Task Force (IETF)                       S. Poretsky
Request for Comments: 6412                          Allot Communications
Category: Informational                                        B. Imhoff
ISSN: 2070-1721                                              F5 Networks
                                                           K. Michielsen
                                                           Cisco Systems
                                                           November 2011

Terminology for Benchmarking Link-State IGP Data-Plane Route Convergence

Abstract

   This document describes the terminology for benchmarking link-state
   Interior Gateway Protocol (IGP) route convergence.  The terminology
   is to be used for benchmarking IGP convergence time through
   externally observable (black-box) data-plane measurements.  The
   terminology can be applied to any link-state IGP, such as IS-IS and
   OSPF.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6412.

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Poretsky, et al.              Informational                     [Page 1]
RFC 6412          IGP Convergence Benchmark Terminology    November 2011

   include Simplified BSD License text as described in Section 4.e of
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Poretsky, et al.              Informational                     [Page 2]
RFC 6412          IGP Convergence Benchmark Terminology    November 2011

Table of Contents

   1.  Introduction and Scope . . . . . . . . . . . . . . . . . . . .  4
   2.  Existing Definitions . . . . . . . . . . . . . . . . . . . . .  4
   3.  Term Definitions . . . . . . . . . . . . . . . . . . . . . . .  5
     3.1.  Convergence Types  . . . . . . . . . . . . . . . . . . . .  5
       3.1.1.  Route Convergence  . . . . . . . . . . . . . . . . . .  5
       3.1.2.  Full Convergence . . . . . . . . . . . . . . . . . . .  5
     3.2.  Instants . . . . . . . . . . . . . . . . . . . . . . . . .  6
       3.2.1.  Traffic Start Instant  . . . . . . . . . . . . . . . .  6
       3.2.2.  Convergence Event Instant  . . . . . . . . . . . . . .  6
       3.2.3.  Convergence Recovery Instant . . . . . . . . . . . . .  7
       3.2.4.  First Route Convergence Instant  . . . . . . . . . . .  8
     3.3.  Transitions  . . . . . . . . . . . . . . . . . . . . . . .  8
       3.3.1.  Convergence Event Transition . . . . . . . . . . . . .  8
       3.3.2.  Convergence Recovery Transition  . . . . . . . . . . .  9
     3.4.  Interfaces . . . . . . . . . . . . . . . . . . . . . . . . 10
       3.4.1.  Local Interface  . . . . . . . . . . . . . . . . . . . 10
       3.4.2.  Remote Interface . . . . . . . . . . . . . . . . . . . 10
       3.4.3.  Preferred Egress Interface . . . . . . . . . . . . . . 10
       3.4.4.  Next-Best Egress Interface . . . . . . . . . . . . . . 11
     3.5.  Benchmarking Methods . . . . . . . . . . . . . . . . . . . 11
       3.5.1.  Rate-Derived Method  . . . . . . . . . . . . . . . . . 11
       3.5.2.  Loss-Derived Method  . . . . . . . . . . . . . . . . . 14