Subject: Re: Odd behavior--explainable?
To: Allen Briggs <briggs@canolog.ninthwonder.com>
From: Gentry A. Bieker <gbieker@crown.NET>
List: tech-net
Date: 06/19/1998 11:12:23
This may have nothing to do with it, but it was the problem with my
NetBSD/sun3 system communicating on a local network at home... Check the
broadcast address. SOMETIMES it would eventutally get through but very
very slow...
------------------------------------------------------------------------
-[ Gentry A. Bieker ]---------[ 6300 Melton Rd. ]--------
-[ Systems Administrator ]---------[ Portage, Indiana 46368 ]--------
-[ Crown.Net, Inc. ]---------[ Phone: (219)762-1431 ]--------
-[ gbieker@crown.net ]---------[ Fax: (219)762-0917 ]--------
------------------------------------------------------------------------
----[ All Unsolicited Commercial E-Mail Sent to this address may be ]---
-----[ subjected to a reading and archival fee not less than $500 ]-----
------------------------------------------------------------------------
On Thu, 18 Jun 1998, Allen Briggs wrote:
> I've got two NetBSD/i386 systems--one running -current as of a couple of
> days ago (+ bouyer's IDE patches), one running 1.3.1. I was trying to
> ftp get on the 1.3.1 machine, pulling from the -current machine. Both
> systems have DEC ethernet controllers (both AF, I think) running at
> 100Mbit, half-duplex. They're attached to a hub with an uplink to a
> switch and one other (relatively low-trafficed) host on the hub.
> The ftp was stalling. I said to myself--"This isn't right. I should
> run tcpdump to see what, if anything, is transpiring." So I ran
> 'tcpdump "host hostA and host hostB"'. As soon as I did that, I started
> getting something like 1-2MB/sec. Still not fabulous, but respectable.
> Since this was a relatively huge file (1.2G), I stopped tcpdump and
> restarted it a couple of times. Whenever I stopped tcpdump, the ftp would
> slow way down. Whenever I restarted tcpdump, the ftp would proceed at a
> more acceptable pace again.
>
> Any thoughts?
>
> -allen
>
> --
> Allen Briggs - briggs@ninthwonder.com
>