Individual Session Control Feature for the Two-Way Active Measurement Protocol (TWAMP)
RFC 5938

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Internet Engineering Task Force (IETF)                         A. Morton
Request for Comments: 5938                                     AT&T Labs
Updates: 5357                                                   M. Chiba
Category: Standards Track                                  Cisco Systems
ISSN: 2070-1721                                              August 2010

                   Individual Session Control Feature
          for the Two-Way Active Measurement Protocol (TWAMP)

Abstract

   The IETF has completed its work on the core specification of TWAMP --
   the Two-Way Active Measurement Protocol.  This memo describes an
   OPTIONAL feature for TWAMP, that gives the controlling host the
   ability to start and stop one or more individual test sessions using
   Session Identifiers.  The base capability of the TWAMP protocol
   requires all test sessions that were previously requested and
   accepted to start and stop at the same time.

Status of This Memo

   This is an Internet Standards Track document.

   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).  Further information on
   Internet Standards is available in 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/rfc5938.

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Morton & Chiba               Standards Track                    [Page 1]
RFC 5938                  TWAMP Session Control              August 2010

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
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   than English.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Requirements Language  . . . . . . . . . . . . . . . . . .  4
   2.  Purpose and Scope  . . . . . . . . . . . . . . . . . . . . . .  4
   3.  TWAMP Control Extensions . . . . . . . . . . . . . . . . . . .  4
     3.1.  Connection Setup with Individual Session Control . . . . .  5
     3.2.  Start-N-Sessions Command with Individual Session
           Control  . . . . . . . . . . . . . . . . . . . . . . . . .  6
     3.3.  Start-N-Ack Command with Individual Session Control  . . .  7
     3.4.  Stop-N-Sessions Command with Individual Session Control  .  9
     3.5.  Stop-N-Ack Command with Individual Session Control . . . . 10
     3.6.  SERVWAIT Timeout Operation . . . . . . . . . . . . . . . . 12
     3.7.  Additional Considerations  . . . . . . . . . . . . . . . . 12
   4.  TWAMP Test with Individual Session Control . . . . . . . . . . 13
     4.1.  Sender Behavior  . . . . . . . . . . . . . . . . . . . . . 13
     4.2.  Reflector Behavior . . . . . . . . . . . . . . . . . . . . 13
   5.  Security Considerations  . . . . . . . . . . . . . . . . . . . 14
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 14
     6.1.  Registry Specification . . . . . . . . . . . . . . . . . . 14
     6.2.  Registry Management  . . . . . . . . . . . . . . . . . . . 14
     6.3.  Experimental Numbers . . . . . . . . . . . . . . . . . . . 15
     6.4.  Registry Contents  . . . . . . . . . . . . . . . . . . . . 15
   7.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 16
   8.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 16
     8.1.  Normative References . . . . . . . . . . . . . . . . . . . 16
     8.2.  Informative References . . . . . . . . . . . . . . . . . . 16

Morton & Chiba               Standards Track                    [Page 2]