The U and G bits in IPv6 Interface Identifiers

Document Type Replaced Internet-Draft (individual)
Authors Brian Carpenter  , Sheng Jiang 
Last updated 2013-05-10 (latest revision 2013-02-21)
Replaced by RFC 7136
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Expired & archived
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IESG IESG state Replaced by draft-ietf-6man-ug
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The IPv6 addressing architecture defines a method by which the Universal and Group bits of an IEEE link-layer address are mapped into an IPv6 unicast interface identifier. This document clarifies the status of those bits for interface identifiers that are not derived from an IEEE link-layer address, and updates RFC 4291 accordingly.


Brian Carpenter (
Sheng Jiang (

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