At 17:28 Uhr +0100 15.3.2000, Matthew Navarre wrote:
>I've got ipnat running on my IIci however it is unusably slow running
>anything on the machines on the internal network. I'm seeing transfer rates
>averaging ~450 bytes per second on a cable modem. in netscape pages start
>to load then stall for 30 seconds to several hours. same problem with
>telnet, ftp etc.
>
>does anyone have any idea why ipnat is this pathetically slow?

Scanning my mailbox, I found several references to RFC1323 in the context
of bad TCP/IP performance, for example

>Delivered-To: hauke@Espresso.Rhein-Neckar.DE
>X-Authentication-Warning: bonzai.pd.tgi.plexus.com: scottr owned process
>doing -bs
>Date: Fri, 12 Sep 1997 17:49:25 -0500 (CDT)
>From: Scott Reynolds <scottr@Plexus.COM>
>X-Sender: scottr@bonzai
>To: maximum entropy <entropy@zippy.bernstein.com>
>cc: jmarin@pyy.jmp.fi, banshee@gabriella.abattoir.com,
>  current-users@NetBSD.ORG
>Subject: Re: network hang
>MIME-Version: 1.0
>Sender: current-users-owner@NetBSD.ORG
>Precedence: list
>Delivered-To: current-users@NetBSD.ORG
>
>We are all aware that RFC 1323 options can cause this sort of behavior,
>right?  This is particularly true of low-speed links.  If you haven't
>already tried this, run
>
>	sysctl -w net.inet.tcp.rfc1323=0
>
>to disable this functionality.  (I have that in /etc/rc.local on my
>machines at home, specifically.)
>
>--scott


-- I am not a network person and have a very dim understanding of the
issues involved, but it's a simple thing to try and maybe somebody else
here can give details.

HTH,

	hauke


--
"It's never straight up and down"     (DEVO)