Extended ICMP to Support Multi-Part Messages
RFC 4884

Approval announcement
Draft of message to be sent after approval:

From: The IESG <iesg-secretary@ietf.org>
To: IETF-Announce <ietf-announce@ietf.org>
Cc: Internet Architecture Board <iab@iab.org>,
    RFC Editor <rfc-editor@rfc-editor.org>
Subject: Protocol Action: 'Extended ICMP to Support Multi-part 
         Messages' to Proposed Standard 

The IESG has approved the following document:

- 'Extended ICMP to Support Multi-part Messages '
   <draft-bonica-internet-icmp-17.txt> as a Proposed Standard

This document has been reviewed in the IETF but is not the product of an
IETF Working Group. 

The IESG contact person is Jari Arkko.

A URL of this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-bonica-internet-icmp-17.txt

Technical Summary
 
  This document extends ICMP error mesages (both IPv4 and
  IPv6) with a mechanism that allows sending additional
  data. A number of use cases for such additional
  data have been proposed, but this draft covers
  only the generic format in which such data can
  be carried.
 
Working Group Summary
 
  This document has been discussed originally in the
  MPLS WG, at which time it became apparent that
  there is a generic part and an MPLS specific
  usage. In 2005-2006 this document has been discussed
  in the Internet Area meetings and list.

  There were a number of controversial discussion
  items in the Internet Area discussion, including,
  for instance, whether IPv6 support should be
  included and the detailed design of the extension
  and length field formats. The final result
  represents the rough consensus of the group.
 
Protocol Quality
 
  This specification has been reviewed by Jari Arkko
  for the IESG. In addition, a number of reviewers
  performed detailed reviews during list discussion.
  These reviewers included Pekka Savola, Pekka Nikander,
  Fernando Gont, Joe Touch and others.

  In late summer 2006 the IESG discussed what criteria
  we should have for changing something as central
  as the ICMP. As a result of these discussions
  the authors enlisted a university group to perform
  experimental analysis of a number of common
  devices and how they interact with the proposed
  extensions. No deviation or error in the normal
  ICMP processing was observed during these tests.

  An early version of this specification (without
  the length field) has also been deployed in the
  MPLS space for both IPv4 and IPv6, by multiple
  vendors. It has been used through the years
  for debugging MPLS networks.