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A Commentary on 4rd-U Architecture and Semantics

Document type: Expired Internet-Draft (individual)
Document stream: No stream defined
Last updated: 2012-10-12 (latest revision 2012-04-10)
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

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IESG State: Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:


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 <>

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