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Aggregated Option for SYN Option Space Extension

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft whose latest revision state is "Expired".
Expired & archived
Author Yoshifumi Nishida
Last updated 2021-08-06 (Latest revision 2021-02-02)
RFC stream (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


TCP option space is scarce resource as its max length is limited to 40 bytes. This limitation becomes more significant in SYN segments as all options used in a connection should be exchanged during SYN negotiations. This document proposes a new SYN option negotiation scheme that provide a feature to compress TCP options in SYN segments and provide more option space. The proposed scheme does not update the format of TCP header nor transmit any additional SYN or SYN-like segments so that it has lower risks for middlebox interventions. In addition, by combining another proposal for option space extension, it is possible to provide further option space.


Yoshifumi Nishida

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