[5801] in RedHat Linux List
Re: Networking question (fwd)
daemon@ATHENA.MIT.EDU (Dwight Johnson)
Sun Nov 24 01:27:03 1996
Date: Sat, 23 Nov 1996 22:26:59 -0800 (PST)
From: Dwight Johnson <djohnson@olympus.net>
To: Red Hat List <redhat-list@redhat.com>
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_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
Dwight Johnson djohnson@olympus.net _/
Computer and Internet Consulting (360) 681-7812 _/
P.O. Box 910, Carlsborg, Washington 98324 _/
---------- Forwarded message ----------
Date: Sat, 23 Nov 1996 00:42:03 -0800
From: JT Traub <jtraub@herne.dragoncat.net>
To: Ben Ketcham <bketcham@anvilite.murkworks.seattle.wa.us>
Cc: linux-list@ssc.com
Subject: Re: Networking question
Resent-Date: Sat, 23 Nov 1996 00:42:08 -0800
Resent-From: linux-list@ssc.com
On Fri, 22 Nov 1996 19:18:42 PST Ben Ketcham said:
>This should not be the case. We are running 1.2.13 here, so maybe
>it's a 2.0.* bug (doubt it though). We have one machine that is
>the gateway, which handles the 28.8k modem to the ISP and also has
>an ethernet card, and a bunch of other machines with ethernet cards.
>Haven't done any explicit testing, but as far as I can tell everyone
>gets equal bandwidth.
My only comment is that I've been running this setup for over a year now,
and I only started noticing this with the 2.0 kernels. Yeah, so 2.0 has
been out for a while, and I've been running it for a while with this problem.
Yeah, I just finally got fed up with it :) sue me :)
>28.8k, especially with all the overhead of tcpip, is just very slow.
>If someone else is doing a big ftp or using Netscape *anywhere on
>the LAN*, response time for everyone else really sucks. But it's
>not a fairness issue; anyone can "hog" the bandwidth in this way,
>from any node on the LAN. Being the gateway or not has nothing
>to do with it.
Yes, when other machines are doing stuff on the net, it does slow down
drastically, but I am noticing that if *I* web or ftp or do anything
that uses a large chunk of bandwidth, then the other computers basically
get NO packets through (or only a miniscule amount). Whereas if netscape
is running on the win95 box, the other win95 box still gets packets through
albeit slower.
If someone has some diagnostic tools that could help me actually pinpoint
exactly what's going on (and some guidance in using them to get useful
data, that would help too). I'm going by observation and ping times
currently which are NOT the most reliable of indicators :)
>It would be nice if the networking code could be tweaked to allot
>more slices to interactive connections such as telnet, vs. "bulk"
>connections such as WWW and ftp, but that's a different matter.
Actually, I'd settle for 'no machine may take up more than x% of the
available bandwidth at once' such as is common on most actual routers.
>Are you quite sure that your gateway, *specifically*, is able to
>hog the bandwidth *more* than anyone else, and not just that on
>a slow link, any time *anyone* is using it heavily, it drags to
>a near-halt?
See above. Anyone using it heavily slows the net down. The gateway
using it pretty much cuts everyone else off. (again, these are not
hard measurments, and I'd be more than willing to track down some real
numbers if someone could point me to the tools and such useful to do this
and give me some idea of what to look for).
--JT
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