[Bug 258732] [tcp] TCP_MAXSEG does not work

From: <bugzilla-noreply_at_freebsd.org>
Date: Fri, 08 Oct 2021 01:11:35 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=258732

--- Comment #8 from zhh0000zhh <me@zhh0000zhh.com> ---
For high performance ipv6 to ipv4 forwarding, mss is required (TCP_NODELAY ON)

and

in rfc879 page 2, Section 3, 
"The MSS can be used completely independently in each
   direction of data flow.  The result may be quite different maximum
   sizes in the two directions."

https://datatracker.ietf.org/doc/html/rfc879#section-3

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