A Session Identifier for the Session Initiation Protocol (SIP)
RFC 7329

Document Type RFC - Informational (August 2014; No errata)
Obsoleted by RFC 7989
Was draft-kaplan-insipid-session-id (individual in rai area)
Last updated 2018-12-20
Replaces draft-kaplan-dispatch-session-id
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IESG IESG state RFC 7329 (Informational)
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Send notices to insipid-chairs@ietf.org
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Internet Engineering Task Force (IETF)                         H. Kaplan
Request for Comments: 7329                                        Oracle
Category: Informational                                      August 2014
ISSN: 2070-1721

     A Session Identifier for the Session Initiation Protocol (SIP)

Abstract

   There is a need for having a globally unique session identifier for
   the same SIP session that can be consistently maintained across SIP
   Proxies, Back-to-Back User Agents (B2BUAs), and other SIP
   middleboxes, for the purpose of troubleshooting.  This document
   proposes a new SIP header to carry such a value: Session-ID.

   The mechanism defined in this document has been widely deployed, and
   is being followed in a backward-compatible fashion for a new
   Standards Track document produced by the INSIPID Working Group.

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/rfc7329.

Kaplan                        Informational                     [Page 1]
RFC 7329                 SIP Session Identifier              August 2014

Copyright Notice

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

   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
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1. Introduction ....................................................3
      1.1. Requirements ...............................................4
   2. Terminology .....................................................4
   3. Overview of Operation ...........................................4
   4. Session-ID Behavior .............................................5
      4.1. Generating a Session-ID Value ..............................5
      4.2. UAC Behavior ...............................................6
      4.3. UAS Behavior ...............................................6
      4.4. Proxy Behavior .............................................6
      4.5. B2BUA Behavior .............................................7
           4.5.1. B2BUA Generation of New Session-ID ..................8
           4.5.2. B2BUA Insertion of Saved Session-ID .................8
   5. Handling SIP Transfer Scenarios .................................8
      5.1. Out-of-Dialog REFER ........................................9
      5.2. Refer-To URI ...............................................9
      5.3. Out-of-Dialog INVITE with Replaces .........................9
   6. Session-ID Migration and Failure Scenarios .....................10
   7. New 'Session-ID' Header ........................................11
      7.1. Augmented BNF Definitions .................................11
   8. Example Exchange ...............................................11
   9. Security Considerations ........................................11
      9.1. Security Considerations for Administrators ................12
      9.2. Security Considerations for Session-ID Extensions .........12
   10. IANA Considerations ...........................................13
   11. Acknowledgments ...............................................13
   12. References ....................................................13
      12.1. Normative References .....................................13
      12.2. Informative References ...................................14
   Appendix A. Use Cases Not in Scope for Session-ID .................15
      A.1. Dialog Correlation for SIP ................................15

Kaplan                        Informational                     [Page 2]
RFC 7329                 SIP Session Identifier              August 2014

1.  Introduction

   This RFC, which contains the text of an individual Internet-Draft
   that was submitted originally to the DISPATCH Working Group, is being
   published now as an Informational document to provide a reference for
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