TCP option "request IPv6 connection"
|Document||Type||Expired Internet-Draft (individual)|
|Last updated||2018-08-15 (latest revision 2018-02-11)|
|Intended RFC status||(None)|
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|Stream||Stream state||(No stream defined)|
|RFC Editor Note||(None)|
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This document describes an idea for a header "option" for the Transmission Control Protocol (TCP). The extension is used by dual-stack nodes to force the use of the IPv6 protocol instead of the IPv4 protocol when exchanging data over TCP. Especially if one of the two nodes is a NAT64 or NAT46 router it makes sense not to use IPv4 but IPv6 if both nodes are dual-stack nodes. This document also suggests to declare the usage of such a method mandatory for all nodes that use IPv4 addresses that will be assigned by RIRs in the future. Doing so will make it impossible to (mis-) use IPv4 addresses assigned by RIRs to ISPs for IPv4-only nodes that do not support IPv6.
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)