Re: Network setup problems (formerly Can anyone give me a clue)

From: stephen parkinson (stephen_at_zmemw16.demon.co.uk)
Date: 03/08/04

  • Next message: Colin Watson: "Re: ssh -X and xauth" 
    Date: Mon, 08 Mar 2004 18:09:14 +0000
To: Debian <debian-user@lists.debian.org>

    Ken Januski wrote:

    > Hi,
    >
    > I'm starting this thread over from one that used to be called "Can
    > anyone give me a clue..." . Sorry for anyone that was trying to help
    > me with that thread. I'm thankful for your help but feel I need to
    > rephrase the problem.
    >
    > First of all I have a crossover cable connecting my Debian machine and
    > a Windows XP machine. I bought it years ago as an experiment because I
    > didn't know if I'd ever really need a network and didn't want to
    > invest in anything more. But as far as I know I should be able to get
    > a basic network with this. Please correct me if I'm wrong.
    >
    > I can ping the Debian box from the windows box and can telnet in
    > successfully. But any attempts to ping the Windows box, either with
    > hostname or IP fail. Basically ping just sits there and does nothing.
    > When I end it I find a 100% packet loss.
    >
    > Ifconfig for eth0 shows both RX and TX packets with no errors or
    > dropped packets. Also I notice that if I ping Debian from Debian the
    > lo packet count goes up not the eth0. This makes me think that it's
    > using the lo interface rather than the eth0. Maybe this is as it
    > should be.
    >
    > I THOUGHT that at one time I was able to ping the Windows box, but
    > only if I turned dialup connection via pon off. That was gist of
    > original message but then I found out that I could no longer reach the
    > network under any circumstances so I decided it was best to rephrase
    > the problem. I do find that if I run pon with eth0 interface up I get
    > this error: "chat: Can't get terminal parameters: input/output." I
    > also find that if I use "ifconfig eth0 up" while I'm connected via pon
    > that I get this error: "pppd script finished...Cannot allocate irq3."
    > So I assume that there is an IRQ conflict.
    >
    > So I'm not sure where to start. It seems to me that the most important
    > thing is to first get the network working and then figure out why
    > there's a conflict with pon.
    >
    > Thanks for any suggestions. The NIC by the way is a 3com 3c905c
    > Tornado. I also notice that dmesg says "eth0: Cannot allocate IRQ 3"
    > right after trying to load the NIC. Perhaps this is the source of the
    > problem. But I guess I'm thrown by the fact that I'm able to connect
    > to the card from Windows.
    >
    > I should add that I've gone through Running Linux, Linux Network
    > Administrator's Guide, and Linux Administration Handbook and still
    > haven't been able to figure out what the problem is. Though I have to
    > add I never really noticed the IRQ problem before.
    >
    > Ken
    >
    >
    no doubt someone else will chip in, i'm almost certainly going to miss
    something

    for a kickoff, i would suggest the outputs of lspci, ifconfig -a, route,
    extracts from dmesg o/p, cat /proc/interrupts o/p and the equivalents
    from the xp box

    i get the feeling that you have a modem, details would be nice, which box?
     which box provides internet, i suspect the debian
    ip_masquade, ip_forwarding ? research reqd, if its xp->internet your
    really after

    there are many poss answers, refine the question and provide some
    significant info

    stephen

    not wanting to use mftr 

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