RFC 4943

IPv6 Neighbor Discovery On-Link Assumption Considered Harmful, September 2007

Canonical URL:
https://www.rfc-editor.org/rfc/rfc4943.txt
File formats:
Plain TextPDF
Status:
INFORMATIONAL
Authors:
S. Roy
A. Durand
J. Paugh
Stream:
IETF
Source:
v6ops (ops)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC4943

Discuss this RFC: Send questions or comments to v6ops@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF


Abstract

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.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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