Using 127-bit IPv6 Prefixes on Inter-Router Links

Document Type Replaced Internet-Draft (individual)
Authors Miya Kohno  , Becca Nitzan  , Randy Bush  , Yoshinobu Matsuzaki  , Lorenzo Colitti  , Thomas Narten 
Last updated 2011-04-06 (latest revision 2010-10-09)
Replaced by RFC 6164
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Expired & archived
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IESG IESG state Replaced by draft-ietf-6man-prefixlen-p2p
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


On inter-router point-to-point links, it is useful for security and other reasons, to use 127-bit IPv6 prefixes. Such a practice parallels the use of 31-bit prefixes in IPv4 [RFC3021]. This document specifies motivation and usages of 127-bit IPv6 prefix lengths on inter-router point-to-point links.


Miya Kohno (
Becca Nitzan (
Randy Bush (
Yoshinobu Matsuzaki (
Lorenzo Colitti (
Thomas Narten (

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