A Commentary on 4rd-U Architecture and Semantics

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Last updated 2012-10-12 (latest revision 2012-04-10)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


4rd-U is proposed as an effort of unifying encapsulation and double translation solutions for the softwire of IPv4 over IPv6 domain. This attempt introduces new behaviors in the Internet transition architecture as well as semantics other than that of well-known Internet protocols. This documents provides a commentary on the semantic changes and their impacts.


Maoke Chen (fibrib@gmail.com)

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