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Article #554

Re: EQL balancing with 2 modems under Linux

#554
From: Jim Segrave
Date: Tue, 21 Jul 1998 00:00
32 lines
2619 bytes
In article <WlN$kJAKLlm1EwsV@thefree.net>,
David James Spillett  <DJSpillett@bigfoot.com> wrote:
> In article <usvbn6.n16.ln@server.localnet.lan>, Hubertus A. Haniel
> <hubertus@haniel.demon.co.uk> writes
> >I can dial up both of the connections to my ISP fine and then bind them
> >both together to the EQL device. But I see no real speed improvement.
> >I have a SupraExpress 56K modem and a 33.600 US Robotics Sportster.
> >for some reason the SupraExpress is not hardly doing any work especially
> >when downloading. While uploading both of the modems seem to have eqal
> >amounts of traffic judging from the LEDs.
> >When I check on the devices with ifconfig the TX amounts are about the
> >same but RX is much more on the Sportster Modem.
> 
> Demon don't support multiply connections like this - the second
> connection gets all the incoming packets as the system [that doesn't
> know about what you are trying to do] assumes the old connection has
> died, hence only one of you modems is getting stuf in.
> 
> It would seem [according to your findings] thjat routing is not
> completely cancelled on the first connection, so your system is still
> able to send packets out OK. I'd test to check this though - you may
> find packets sent down the first connection are just leaking out into
> the ether...

The Ascend with the first connection will still route packets to/from
the dial-up modem. However, Demon's routers will all only route to the
most recently established connection. So return packets will all go to
the second connection, packets from your host can come from
either. And, if you drop the second connection, you can send packets
but nor recieve them. You may shortly thereafter have some explaining
to do to Demon, as we consider that a distinctly unfriendly thing to
do.
Technical Details
Message-ID: <E0yygNV-0005zL-00@jes.noc.nl.demon.net>
Path: arc1-ca.pugleaf.net!unknown!not-for-mail
References: <usvbn6.n16.ln@server.localnet.lan> <WlN$kJAKLlm1EwsV@thefree.net>

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From: Jim Segrave <jes@nl.demon.net>
Subject: Re: EQL balancing with 2 modems under Linux
Date: 1998/07/21
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