cvs commit: src/sys/netinet tcp.h

YONETANI Tomokazu qhwt+dfly at
Fri Jan 28 16:49:06 PST 2005

On Sat, Jan 08, 2005 at 01:50:17AM -0800, Jeffrey Hsu wrote:
> hsu         2005/01/08 01:50:17 PST
> DragonFly src repository
>   Modified files:
>     sys/netinet          tcp.h 
>   Log:
>   Increase the default TCP maximum segment size from 512 to 1460.
>   The modern consensus is that 1500 is a safe MTU to use for the Internet.

So you may want to try reducing net.inet.tcp.mssdflt to 512 if you
upgraded your DragonFly_Stable machine after 2005-01-21 and TCP
connections with machines behind a poor router suddenly started to fail?
(like ssh session suddenly freezes when a bunch of characters are displayed,
or you see "- stall -" message when you're transfering files from/to
a DragonFly box)

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