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Insipid Status Pages

INtermediary-safe SIP session ID (Concluded WG)
Art Area: Adam Roach, Alexey Melnikov, Ben Campbell | 2012-Mar-19 — 2015-Feb-07 

2017-08-02 charter

INtermediary-safe SIP session ID (insipid)


 Current Status: Active

     Gonzalo Salgueiro <gsalguei@cisco.com>
     Keith Drage <drageke@ntlworld.com>

 Applications and Real-Time Area Directors:
     Ben Campbell <ben@nostrum.com>
     Alexey Melnikov <aamelnikov@fastmail.fm>
     Adam Roach <adam@nostrum.com>

 Applications and Real-Time Area Advisor:
     Ben Campbell <ben@nostrum.com>

 Mailing Lists:
     General Discussion: insipid@ietf.org
     To Subscribe:       https://www.ietf.org/mailman/listinfo/insipid
     Archive:            https://mailarchive.ietf.org/arch/browse/insipid/

Description of Working Group:

  An end-to-end session identifier in SIP-based multimedia communication
  networks refers to the ability for endpoints, intermediate devices,
  and management and monitoring system to identify and correlate SIP
  messages and dialogs of the same higher-level end-to-end
  "communication session" across multiple SIP devices, hops, and
  administrative domains.  Unfortunately, there are a number of factors
  that contribute to the fact that the current dialog identifiers
  defined in SIP are not suitable for end-to-end session
  identification. Perhaps the most important factor worth describing is
  that in real-world deployments of Back-to-Back User Agents (B2BUAs)
  devices like Session Border Controllers (SBC) often change the call
  identifiers (e.g., the From-tag and To-tag that are used in
  conjunction with the Call-ID header to make the dialog-id) as the
  session signaling passes through.

  An end-to-end session identifier should allow the possibility to
  identify the communication session from the point of origin, passing
  through any number of intermediaries, to the ultimate point of
  termination. It should have the same aim as the From-tag, To-tag and
  Call-ID conjunction, but should not be mangled by intermediaries.

  A SIP end-to-end session identifier has been considered as possible
  solution of different use cases like troubleshooting, billing, session
  recording, media and signaling correlation, and so forth.  Some of
  these requirements come from other working groups within the RAI area
  (e.g., SIPRec).  Moreover, other standards organizations have
  identified the need for SIP and H.323 to carry the same "session ID"
  value so that it is possible to identify a call end-to-end even when
  performing inter working between protocols.

  Troubleshooting SIP signalling end-to-end becomes impractical as
  networks grow and become interconnected, including connection via
  transit networks, because the path that SIP signalling will take
  between clients cannot be predicted and the signalling volume and
  geographical spread are too large.

  This group will focus on two documents:

  The first document will specify a SIP identifier that has the same aim
  as the From-tag, To-tag and Call-ID conjunction, but is less likely to
  be mangled by intermediaries.  In doing this work, the group will pay
  attention to the privacy implications of a "session ID", for example
  considering the possibility to make it intractable for nodes to
  correlate "session IDs" generated by the same user for different

  The second document will define an indicator that can be added to the
  SIP protocol to indicate that signalling should be logged. The
  indicator 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.

Goals and Milestones:
  Done     - Requirements and use cases for new identifier sent to IESG (Informational)
  Done     - Requirements for marking SIP sessions for logging to IESG (Informational)
  Done     - Specification of the new identifier sent to the IESG (Proposed Standard)
  Jun 2017 - Protocol for marking SIP sessions for logging to IESG (Proposed Standard)

All charter page changes, including changes to draft-list, rfc-list and milestones:

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