Marking SIP Messages to Be Logged
RFC 8497
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RFC - Proposed Standard
(November 2018; No errata)
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Last updated |
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2018-12-19
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Replaces |
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draft-dawes-insipid-logme-marking
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Gonzalo Salgueiro
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Shepherd write-up |
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Show
(last changed 2018-02-11)
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IESG state |
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RFC 8497 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Ben Campbell
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Send notices to |
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(None)
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| IANA |
IANA review state |
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Version Changed - Review Needed
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IANA action state |
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) P. Dawes
Request for Comments: 8497 Vodafone Group
Category: Standards Track C. Arunachalam
ISSN: 2070-1721 Cisco Systems
November 2018
Marking SIP Messages to Be Logged
Abstract
SIP networks use signaling monitoring tools to diagnose user-reported
problems and to perform regression testing if network or user agent
(UA) software is upgraded. As networks grow and become
interconnected, including connection via transit networks, it becomes
impractical to predict the path that SIP signaling will take between
user agents and therefore impractical to monitor SIP signaling end to
end.
This document describes an indicator for the SIP protocol that can be
used to mark signaling as being of interest to logging. Such marking
will typically be applied as part of network testing controlled by
the network operator and is not used in normal user agent signaling.
Operators of all networks on the signaling path can agree to carry
such marking end to end, including the originating and terminating
SIP user agents, even if a session originates and terminates in
different networks.
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 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8497.
Dawes & Arunachalam Standards Track [Page 1]
RFC 8497 Log Me Marking November 2018
Copyright Notice
Copyright (c) 2018 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
(https://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
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 4
3. "Log Me" Marking Protocol Aspects . . . . . . . . . . . . . . 4
3.1. Session-ID "logme" Parameter . . . . . . . . . . . . . . 4
3.2. Starting and Stopping Logging . . . . . . . . . . . . . . 5
3.3. Identifying Test Cases . . . . . . . . . . . . . . . . . 6
3.4. Passing the Marker . . . . . . . . . . . . . . . . . . . 6
3.4.1. To/From a User Device . . . . . . . . . . . . . . . . 6
3.4.2. To/From an External Network . . . . . . . . . . . . . 6
3.4.3. Across a Non-supporting SIP Intermediary . . . . . . 6
3.5. Logging Multiple Simultaneous Dialogs . . . . . . . . . . 6
3.6. Format of Logged Signaling . . . . . . . . . . . . . . . 7
3.7. Marking-Related Dialogs . . . . . . . . . . . . . . . . . 7
3.8. Forked Requests . . . . . . . . . . . . . . . . . . . . . 13
4. SIP Entity Behavior . . . . . . . . . . . . . . . . . . . . . 13
4.1. Scope of Marking . . . . . . . . . . . . . . . . . . . . 13
4.2. Endpoints . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3. SIP Intermediaries Acting on Behalf of Endpoints . . . . 15
4.4. B2BUAs . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5. "Log Me" Marker Processing by SIP Intermediaries . . . . 17
4.5.1. Stateless Processing . . . . . . . . . . . . . . . . 17
4.5.2. Stateful Processing . . . . . . . . . . . . . . . . . 17
4.5.2.1. "Log Me" Marking Not Supported by Originating UA 18
4.5.2.2. "Log Me" Marking Not Supported by Terminating UA 21
4.5.2.3. "Log Me" Marking Removed by Originating Network . 23
4.5.2.4. "Log Me" Marking Removed by Supporting
Terminating Network . . . . . . . . . . . . . . . 26
4.5.2.5. "Log Me" Marking Passed by Non-supporting
Terminating Network . . . . . . . . . . . . . . . 28
Dawes & Arunachalam Standards Track [Page 2]
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