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RFC 4943
Title: IPv6 Neighbor Discovery On-Link Assumption
Considered Harmful
Author: S. Roy, A. Durand,
J. Paugh
Status: Informational
Date: September 2007
Mailbox: sebastien.roy@sun.com,
alain_durand@cable.comcast.com,
jim.paugh@nominum.com
Pages: 8
Characters: 16719
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-v6ops-onlinkassumption-04.txt
URL: http://www.rfc-editor.org/rfc/rfc4943.txt
This document describes the historical and background information
behind the removal of the "on-link assumption" from the conceptual
host sending algorithm defined in Neighbor Discovery for IP Version 6
(IPv6). According to the algorithm as originally described, when a
host's default router list is empty, the host assumes that all
destinations are on-link. This is particularly problematic with
IPv6-capable nodes that do not have off-link IPv6 connectivity (e.g.,
no default router). This document describes how making this
assumption causes problems and how these problems outweigh the
benefits of this part of the conceptual sending algorithm. This memo
provides information for the Internet community.
This document is a product of the IPv6 Operations
Working Group of the IETF.
INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution
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