[NTLUG:Discuss] networking questions

[Jonathan Brugge]

Make sure you have the following:

-use two network-cards to connect the pc's, and another one to connect to 
the dsl-modem. Don't place the dsl-cable and the crossover to the other pc 
on one card.

-if the above is correct, configure the two cards (one for the network and 
one for the modem) that are in your pc. Give them a local IP, like 
192.168.0.1 (and 192.168.0.2 on the other side). Your dsl-card can have a 
dynamic ip-address. Then set on the other pc (the one with only one card) a 
gateway using 192.168.0.1 (or whatever IP you gave it).

I'm not sure whether you haven't done this already, couldn't find it in your 
message. You don't need a hub or any other hardware.

Jonathan Brugge <jonathan_brugge at hotmail.com>

P.S.1: The above works fine here with a cable connection.

P.S.2: Make sure you don't change the card that's used by the dsl-modem. 
Probably the modem looks at the hardware-number of the card to verify that 
it's still the same card.


>From: Richard Cobbe <cobbe at directlink.net>
>Reply-To: discuss at ntlug.org
>To: discuss at ntlug.org
>Subject: [NTLUG:Discuss] networking questions
>Date: Sat, 2 Sep 2000 16:42:42 -0500 (CDT)
>
>Hello, all.  I've got a couple of related networking questions that I'd
>like some input on.  The computer in common between these two scenarios is
>running a fairly stock RH6.2, kernel 2.2.16 (with the redhat patches,
>though I've recompiled it).  My ethernet card is a PCI 3Com 3c905, and I'm
>using the driver that's included in the kernel source: it's apparently
>3Com's driver, v 1.0.0d (1999).
>
>1) A couple of times over the last few months, I've tried to hook two
>    (Linux) computers together---directly---using ethernet 10baseT.  My
>    understanding is that you can do this by hooking the ethernet cards of
>    the two systems together, using a crossover cable.
>
>    It doesn't seem to work.  When I try to go from my normal system (stock
>    RH6.2, kernel 2.2.16), it locks up the machine hard enough to require a
>    power cycle.  At first, I thought this was because my routing table was
>    messed up, so I manually removed all of the incorrect routes and added 
>a
>    specific route for the other host, going out eth0.  (I left the 
>loopback
>    and ``reflexive'' routes alone.)  Didn't help.
>
>    Is this, in fact, possible?  If so, what am I missing?  Or do I need a
>    10baseT hub?
>
>2) Separate issue.  At one point (I don't recall exactly why I got into
>    this situation), I had my system/network set up almost as normal.  The
>    only difference was that the 10baseT crossover cable which normally
>    connects my PC and my DSL modem wasn't plugged into the modem.
>
>    I tried to ping some host, and the computer immediately hard-booted
>    itself.
>
>    That shouldn't have happened, yes?  Obviously, if the cable isn't
>    plugged in, I shouldn't get a response, but it shouldn't hardboot the
>    machine, right?
>
>    I don't know if it matters, but the cable in question is actually two
>    cables.  There's the two-foot crossover cable which came with the 
>modem,
>    then a straight-through female-female connector, then a ~25-foot patch
>    cable.  The patch cable is plugged into my PC, and the crossover cable
>    is (usually) plugged into the DSL modem.
>
>Any insights as to what the story is here?
>
>Richard
>
>_______________________________________________
>http://ntlug.org/mailman/listinfo/discuss

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