Close encounters of the ICMP type 2 kind (near misses with ICMPv6 PTB)

Document Type Expired Internet-Draft (individual)
Authors Matt Byerly  , Matt Hite  , Joel Jaeggli 
Last updated 2015-02-25 (latest revision 2014-08-24)
Replaces draft-jaeggli-v6ops-pmtud-ecmp-problem
Stream Internet Engineering Task Force (IETF)
Intended RFC status Informational
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state (None)
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document calls attention to the problem of delivering ICMPv6 type 2 "Packet Too Big" (PTB) messages to intended destinations in ECMP load balanced, anycast network architectures. It discusses operational mitigations that can address this class of failure.


Matt Byerly (
Matt Hite (
Joel Jaeggli (

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