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Date:      Mon, 25 Dec 1995 23:27:28 +0200
From:      Petri Helenius <pete@sms.fi>
To:        kelly@fsl.noaa.gov (Sean Kelly)
Cc:        questions@freebsd.org
Subject:   Re: Unpleasant scrolling behaviour on 2.1.0 (fwd)
Message-ID:  <199512252127.XAA26484@silver.sms.fi>
In-Reply-To: <9512251329.AA15874@emu.fsl.noaa.gov>
References:  <199512250754.JAA24927@silver.sms.fi> <9512251329.AA15874@emu.fsl.noaa.gov>

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Sean Kelly writes:

 > Okay, the magic 1500 works ... I suppose if I thought about it, that'd
 > be the correct size for a full IP header plus checksum or other such
 > explanation, but being Christmas day and all, I'll just assume a
 > little magic. :-)
 >
No it's just that your MTU should be smaller than your TCP window size,
othervise you make TCP a stop-and-go protocol. I have no idea when the
non-networking skilled individual that changed the lo0 MTU default to
16384 is going to correct his mistake. It's an obvious annoyance to
everyone who's using 127.0.0.1 for any purpose.

 > Now, should that other fellow who posted the problem make the mtu 1500
 > for his Ethernet interface as well?
 > 
That's the default. Nobody has screwed that (mainly because of the physical
limitations of the media :-)

Pete



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