Marking SIP Messages to be Logged
draft-ietf-insipid-logme-marking-01

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Internet Engineering Task Force                                 P. Dawes
Internet-Draft                                            Vodafone Group
Intended status: Standards Track                         August 28, 2014
Expires: March 1, 2015

                   Marking SIP Messages to be Logged
                  draft-ietf-insipid-logme-marking-01

Abstract

   SIP networks use signalling monitoring tools to diagnose user
   reported problems and for regression testing if network or user agent
   software is upgraded.  As networks grow and become interconnected,
   including connection via transit networks, it becomes impractical to
   predict the path that SIP signalling will take between user agents,
   and therefore impractical to monitor SIP signalling end-to-end.

   This document describes an indicator for the SIP protocol which can
   be used to mark signalling as of interest to logging.  Such marking
   will typically be applied as part of network testing controlled by
   the network operator and not used in regular user agent signalling.
   However, such marking can be carried end-to-end including the SIP
   user agents, even if a session originates and terminates in different
   networks.

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 March 1, 2015.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Dawes                     Expires March 1, 2015                 [Page 1]
Internet-Draft               log me marking                  August 2014

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  Motivating Scenario . . . . . . . . . . . . . . . . . . . . .   3
   4.  Skeleton Diagnostic Procedure . . . . . . . . . . . . . . . .   4
   5.  Protocol for Log-Me Marking . . . . . . . . . . . . . . . . .   5
     5.1.  Configuration for Log-Me Marking  . . . . . . . . . . . .   5
     5.2.  Starting and Stopping Log-Me Marking  . . . . . . . . . .   5
     5.3.  End Points of Log-Me Marking  . . . . . . . . . . . . . .   6
       5.3.1.  Originating and Terminating User Agent  . . . . . . .   6
       5.3.2.  Originating Edge Proxy and Terminating Edge Proxy . .   7
     5.4.  Maintaining State . . . . . . . . . . . . . . . . . . . .   7
     5.5.  Missing Log-me Marker in Dialog Being Logged  . . . . . .   9
     5.6.  Logging Multiple Simultaneous Dialogs . . . . . . . . . .  10
     5.7.  Forked Requests . . . . . . . . . . . . . . . . . . . . .  10
     5.8.  B2BUA Handling of Log-Me Marked Dialogs . . . . . . . . .  10
       5.8.1.  All B2BUA Roles . . . . . . . . . . . . . . . . . . .  10
       5.8.2.  Proxy-B2BUA . . . . . . . . . . . . . . . . . . . . .  10
         5.8.2.1.  Terminating Behaviour . . . . . . . . . . . . . .  10
       5.8.3.  Signaling-only and SDP-Modifying Signaling-only . . .  11
         5.8.3.1.  Terminating Behaviour . . . . . . . . . . . . . .  11
         5.8.3.2.  Originating Behaviour . . . . . . . . . . . . . .  11
       5.8.4.  Media Relay, Media Aware, Media Termination . . . . .  11
     5.9.  'Log-Me' Marker . . . . . . . . . . . . . . . . . . . . .  11
       5.9.1.  Header Field Parameter for Session-ID . . . . . . . .  11
       5.9.2.  Identifying Test Cases  . . . . . . . . . . . . . . .  12
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
     6.1.  Trust Domain  . . . . . . . . . . . . . . . . . . . . . .  12
     6.2.  Security Threats  . . . . . . . . . . . . . . . . . . . .  12
       6.2.1.  The Log-Me Marker . . . . . . . . . . . . . . . . . .  12