Migrating SIP to IPv6 Media Without Connectivity Checks

Document Type Withdrawn by Submitter Internet-Draft (individual)
Last updated 2010-10-13 (latest revision 2010-08-27)
Stream (None)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Withdrawn by Submitter
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


During the migration from IPv4 to IPv6, it is anticipated that an IPv6 path might be broken for a variety of reasons, causing endpoints to not receive RTP data. Connectivity checks would detect and avoid the user noticing such a problem, but there is industry reluctance to implement connectivity checks. This document describes a mechanism allowing dual-stack SIP endpoints to attempt communications over IPv6 and fall back to IPv4 if the IPv6 path is not working. The mechanism does not require connectivity checks.


Dan Wing (dwing@cisco.com)
Andrew Yourtchenko (ayourtch@cisco.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)