Shepherd writeup
rfc8421-07

1. Summary

The document shepherd is Ari Keränen. The responsible Area Director is Ben Campbell. 

This document provides guidelines on how to make Interactive Connectivity Establishment (ICE) conclude faster in multihomed and IPv4/IPv6 dual-stack scenarios where broken paths exist. The provided guidelines are backwards compatible with the original ICE specification. 

2. Review and Consensus

The document has been worked both at MMUSIC and ICE working groups since IETF #86 and the document has received multiple reviews over time. Overall the mechanism is simple but details of the suggested algorithm were discussed and updated throughout the process. General concerns on behaviour with unreliable tunnelling mechanisms were raised but no specific issues were discovered and the draft was updated to note this issue in general. The final version received four reviews. Reviews from WGLC resulted only in editorial changes. There are two implementations of the mechanism.

3. Intellectual Property

Each author has confirmed conformance with BCP 78/79. There are no IPR disclosures on the document.

4. Other Points

While the document uses RFC2119 text to describe the mechanism, there was WG consensus to publish this as Informational document. The reference to obsoleted RFC 3484 is intentional as it is part of the discussion of evolution of prioritisation rules.
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