A Media-Based Traceroute Function for the Session Initiation Protocol
RFC 7403, “A Media-Based Traceroute Function for the Session Initiation Protocol”, is a Proposed Standard document published in November 2014 by H. Kaplan. The canonical text is published by the RFC Editor.
Abstract
SIP already provides the ability to perform hop-by-hop traceroute for SIP messages using the Max-Forwards header field to determine the reachability path of requests to a target. A mechanism for media-loopback calls has also been defined separately, which enables test calls to be generated that result in media being looped back to the originator. This document describes a means of performing hop-by-hop traceroute-style test calls using the media-loopback mechanism to test the media path when SIP sessions go through media-relaying back-to-back user agents (B2BUAs).
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 7403 is hosted at rfc-editor.org. Available in TXT,HTML.
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