Requirements for Marking SIP Messages to be Logged
draft-ietf-insipid-logme-reqs-01

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Document Type Active Internet-Draft (insipid WG)
Author Peter Dawes 
Last updated 2014-07-21
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Internet Engineering Task Force                                 P. Dawes
Internet-Draft                                            Vodafone Group
Intended status: Standards Track                           July 21, 2014
Expires: January 22, 2015

           Requirements for Marking SIP Messages to be Logged
                    draft-ietf-insipid-logme-reqs-01

Abstract

   SIP networks use signalling monitoring tools to diagnose user
   reported problem and for regression testing if network or client
   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 clients, and
   therefore impractical to monitor SIP signalling end-to-end.

   This draft describes requirements for adding an indicator to 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
   client signalling.  However, such marking can be carried end-to-end
   including the SIP terminals, 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.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on January 22, 2015.

Copyright Notice

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

Dawes                   Expires January 22, 2015                [Page 1]
Internet-Draft                log me marker                    July 2014

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  Motivating Scenario . . . . . . . . . . . . . . . . . . . . .   3
   4.  Skeleton Diagnostic Procedure . . . . . . . . . . . . . . . .   4
   5.  Requirements for a Log Me Marker  . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
     6.1.  Trust Domain  . . . . . . . . . . . . . . . . . . . . . .   6
     6.2.  Security Threats  . . . . . . . . . . . . . . . . . . . .   6
       6.2.1.  Log-me marking  . . . . . . . . . . . . . . . . . . .   6
       6.2.2.  Sending logged information  . . . . . . . . . . . . .   7
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Additional Stuff . . . . . . . . . . . . . . . . . .   8
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   If users experience problems with setting up sessions using SIP,
   their service provider needs to find out why by examining the SIP
   signalling.  Also, if network or client software or hardware is
   upgraded regression testing is needed.  Such diagnostics apply to a
   small proportion of network traffic and can apply end-to-end, even if
   signalling crosses several networks possibly belonging to several
   different network operators.  It may not be possible to predict the
   path through those networks in advance, therefore a mechanism is
   needed to mark a session as being of interest to enable SIP entities
   along the signalling path to provide diagnostic logging.  This draft
   describes the requirements for such a 'log me' marker for SIP
   signalling.

2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].
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