Mixed Security Mode for the Two-Way Active Measurement Protocol (TWAMP)
RFC 5618

Network Working Group                                          A. Morton
Request for Comments: 5618                                     AT&T Labs
Updates: 5357                                                 K. Hedayat
Category: Standards Track                                           EXFO
                                                             August 2009

Mixed Security Mode for the Two-Way Active Measurement Protocol (TWAMP)

Abstract

   This memo describes a simple extension to TWAMP (the Two-Way Active
   Measurement Protocol).  The extension adds the option to use
   different security modes in the TWAMP-Control and TWAMP-Test
   protocols simultaneously.  The memo also describes a new IANA
   registry for additional features, called the TWAMP Modes registry.

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

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Morton & Hedayat            Standards Track                     [Page 1]
RFC 5618                    TWAMP Extensions                 August 2009

Table of Contents

   1. Introduction ....................................................2
      1.1. Requirements Language ......................................3
   2. Purpose and Scope ...............................................3
   3. TWAMP Control Extensions ........................................3
      3.1. Extended Control Connection Setup ..........................3
   4. Extended TWAMP Test .............................................5
      4.1. Sender Behavior ............................................5
           4.1.1. Packet Timings ......................................5
           4.1.2. Packet Format and Content ...........................5
      4.2. Reflector Behavior .........................................6
   5. Security Considerations .........................................6
   6. IANA Considerations .............................................6
      6.1. Registry Specification .....................................6
      6.2. Registry Management ........................................6
      6.3. Experimental Numbers .......................................7
      6.4. Initial Registry Contents ..................................7
   7. Acknowledgements ................................................7
   8. Normative References ............................................7

1.  Introduction

   The Two-Way Active Measurement Protocol (TWAMP) [RFC5357] is an
   extension of the One-Way Active Measurement Protocol (OWAMP)
   [RFC4656].  The TWAMP specification gathered wide review as it
   approached completion, and the by-products were several
   recommendations for new features in TWAMP.  There is a growing number
   of TWAMP implementations at present, and widespread usage is
   expected.  There are even devices that are designed to test
   implementations for protocol compliance.

   This memo describes a simple extension for TWAMP: the option to use
   different security modes in the TWAMP-Control and TWAMP-Test
   protocols (mixed security mode).  It also describes a new IANA
   registry for additional features, called the TWAMP Modes registry.

   When the Server and Control-Client have agreed to use the mixed
   security mode during control connection setup, then the Control-
   Client, the Server, the Session-Sender, and the Session-Reflector