Recommendation on Stable IPv6 Interface Identifiers

The information below is for an old version of the document
Document Type Expired Internet-Draft (6man WG)
Authors Fernando Gont  , Alissa Cooper  , Dave Thaler  , Will LIU 
Last updated 2014-07-28 (latest revision 2014-01-24)
Stream Internet Engineering Task Force (IETF)
Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Stateless Address Autoconfiguration (SLAAC) for IPv6 typically results in hosts configuring one or more stable addresses composed of a network prefix advertised by a local router, and an Interface Identifier that typically embeds a hardware address (e.g., an IEEE LAN MAC address). The security and privacy implications of embedding hardware addresses in the Interface Identifier have been known and understood for some time now, and some popular IPv6 implementations have already deviated from such schemes to mitigate these issues. This document recommends [I-D.ietf-6man-stable-privacy-addresses] as the default scheme for the generating stable IPv6 addresses and recommends against embedding hardware addresses in IPv6 Interface Identifiers.


Fernando Gont (
Alissa Cooper (
Dave Thaler (
Will LIU (

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