[4314] in linux-net channel archive
Re: bad PPP Performance (with and without IRQTUNE)
daemon@ATHENA.MIT.EDU (Alan Cox)
Fri Sep 6 17:34:02 1996
From: alan@lxorguk.ukuu.org.uk (Alan Cox)
To: Paul.Mackerras@cs.anu.edu.au
Date: Thu, 5 Sep 1996 21:24:47 +0100 (BST)
Cc: neuffer@kyle.i-connect.net, linux-net@vger.rutgers.edu,
linux-ppp@vger.rutgers.edu
In-Reply-To: <199609050614.QAA23101@avago.anu.edu.au> from "Paul Mackerras" at Sep 5, 96 04:14:58 pm
> This sounds very much like symptoms I've often seen on PPP links. The
> problem seems to be that the sender is retransmitting an awful lot (as
> indicated by netstat -s on most systems except linux), not that PPP is
> dropping or corrupting packets. I don't know exactly why the sender
> should be retransmitting so much, but reducing the mru to 552 or even
> 296 helps a lot.
Solaris 2.4 and 2.5 have serious bugs that cause this. There is a patchkit
for 2.5.1 out now and the difference it makes is huge.
Alan
