RNFD: Fast border router crash detection in RPL
draft-ietf-roll-rnfd-07

Approval announcement
Draft of message to be sent after approval:

Announcement

From: The IESG <iesg-secretary@ietf.org>
To: IETF-Announce <ietf-announce@ietf.org>
Cc: The IESG <iesg@ietf.org>, draft-ietf-roll-rnfd@ietf.org, jgs@juniper.net, mcr+ietf@sandelman.ca, rfc-editor@rfc-editor.org, roll-chairs@ietf.org, roll@ietf.org
Subject: Protocol Action: 'RNFD: Fast border router crash detection in RPL' to Proposed Standard (draft-ietf-roll-rnfd-07.txt)

The IESG has approved the following document:
- 'RNFD: Fast border router crash detection in RPL'
  (draft-ietf-roll-rnfd-07.txt) as Proposed Standard

This document is the product of the Routing Over Low power and Lossy networks
Working Group.

The IESG contact persons are Gunter Van de Velde, Jim Guichard and John
Scudder.

A URL of this Internet-Draft is:
https://datatracker.ietf.org/doc/draft-ietf-roll-rnfd/

Ballot Text

Technical Summary

   By and large, a correct operation of a RPL network requires border
   routers to be up.  In many applications, it is beneficial for the
   nodes to detect a crash of a border router as soon as possible to
   trigger fallback actions.  This document describes RNFD, an extension
   to RPL that expedites border router failure detection, even by an
   order of magnitude, by having nodes collaboratively monitor the
   status of a given border router.  The extension introduces an
   additional state at each node, a new type of RPL Control Message
   Options for synchronizing this state among different nodes, and the
   coordination algorithm itself.

Working Group Summary

   The shepherd writeup notes "consensus was not rough".  There is 
   an IOTDIR review which notes "not ready", however the author
   responded in https://mailarchive.ietf.org/arch/msg/iot-directorate/M1AarDGI7qHpvDgz3zqiz2N1TRw/
   and although the reviewer hasn't followed up to that reply, 
   it appears as though their concerns have been addressed.

Document Quality

   There were several detailed reviews, including one by Victoria
   Pritchard (https://mailarchive.ietf.org/arch/msg/rtg-dir/XXA90ID24LnIm8Rc2pKZFCmQQAA/)
   which I (John) found especially helpful.

Personnel

   The Document Shepherd for this document is Michael Richardson. The
   Responsible Area Director is John Scudder.

RFC Editor Note