Tentative Options for Link-Layer Addresses in IPv6 Neighbour Discovery

Document Type Expired Internet-Draft (dna WG)
Authors Greg Daley  , Erik Nordmark 
Last updated 2009-10-26 (latest revision 2009-10-25)
Stream Internet Engineering Task Force (IETF)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state WG Document
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The proposed IPv6 Duplicate Address Detection (DAD) Optimization "Optimistic DAD" defines a set of recoverable procedures which allow a node to make use of an address before DAD completes. Essentially, Optimistic DAD forbids usage of certain Neighbour Discovery options which could pollute active neighbour cache entries, while an address is tentative. This document defines a new option and procedures to replace cache polluting options, in a way which is useful to tentative nodes. These procedures are designed to be to backward compatible with existing devices which support IPv6 Neighbour Discovery.


Greg Daley (gdaley@netstarnetworks.com)
Erik Nordmark (nordmark@acm.org)

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