unexplained network problems

From: Marty Landman (MLandman_at_face2interface.com)
Date: 03/04/04

  • Next message: Anthony Campbell: "Re: Newbies! please check this out -> http://www.aboutdebian.com/" 
    Date: Thu, 04 Mar 2004 09:33:08 -0500
To: debian-user@lists.debian.org

    Running woody on a lan using another box - 192.168.0.1 as the gateway. The
    debian box runs samba as do two other nix boxes. Last night everything
    seemed fine, this morning for unknown reasons my debian box doesn't seem to
    be able to talk with anything else.

    Can ping myself by name, network ip, or as localhost but ping attempts to
    other boxes hang. An ifconfig -a shows the nic up and running, with 0 RX
    packet errors and 1311 TX packet errors. A netstat -rn shows two entries,
    one for my class c network and one for my gateway which is win xp.

    destination gateway genmask flags iface

    192.168.0.0 0.0.0.0 255.255.255.0 U eth0
    0.0.0.0 192.168.0.1 0.0.0.0 UG eth0

    Here's what happened next: # as root of course - manually copying from the
    console

    ifconfig eth0 down
    rmmod tulip # using this driver for my netgear fs310tx nic
    modprobe tulip
    /etc/rc.d/networking restart
    bash: /etc/rc.d/networking: No such file or directory
    route add gw 192.168.0.1
    gw: host name lookup failure
    ping 192.168.0.1
    ping: sendto: network is unreachable

    The light for this nic on my switch was on and blinking so I removed it and
    reinserted; stopped blinking, went through the commands above again with
    similar results and then rebooted.

    Everything is ok now.

    Only I feel like an idiot. What happened and how did I fix it? Had a
    problem with this box's connection a few weeks ago too, which is how I knew
    the steps to try and recover. Any pointers on how I can educate myself to
    at least understand what I'm doing - not to mention get a clue about what
    problem is bringing my network down every couple weeks would be most
    gratefully accepted.

    Marty Landman Face 2 Interface Inc. 845-679-9387
    FormATable DB: http://face2interface.com/Products/FormATable.shtml
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