Dual-stack lite broadband deployments post IPv4 exhaustion

Document Type Replaced Internet-Draft (individual)
Last updated 2009-03-11 (latest revision 2008-11-03)
Replaces draft-droms-softwires-snat, draft-durand-dual-stack-lite
Replaced by draft-ietf-softwire-dual-stack-lite
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Expired & archived
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IESG IESG state Replaced by draft-ietf-softwire-dual-stack-lite
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The common thinking for more than 10 years has been that the transition to IPv6 will be based on the dual stack model and that most things would be converted this way before we ran out of IPv4. It has not happened. The IANA free pool of IPv4 addresses will be depleted soon, well before any significant IPv6 deployment will have occurred. This document revisits the dual-stack model and introduces the dual- stack lite technology aimed at better aligning the costs and benefits of deploying IPv6. Dual-stack lite will provide the necessary bridge between the two protocols, offering an evolution path of the Internet post IANA IPv4 depletion.


Alain Durand (alain_durand@cable.comcast.com)
Ralph Droms (rdroms@cisco.com)
Brian Haberman (brian@innovationslab.net)
james (jhw@apple.com)

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