Re: NIC War

From: Ian Melnick (dazed_at_vonsteuben.cps.k12.il.us)
Date: 04/20/04

  • Next message: Christian Schnobrich: "Re: SCSI harddisk: spin down?" 
    Date: Mon, 19 Apr 2004 18:01:50 -0500
To: debian-user@lists.debian.org

    > nic1: ipA, macA
    > nic2: ipB, macB
    > On the network attached to nic1 one you send an arp request:
    > "who-has ipA tell x.x.x.x"
    > where "ipA" is the ip you believe is assigned to nic1. nic1 does not
    > respond. nic2 responds with:
    > "ipA is-at macB".

    Yes, this is what's happening.

    > At the time of this flip, according to the local machine is the
    > assignment still as follows (still correct)?
    > nic1: ipA, macA
    > nic2: ipB, macB

    Yes, when I do `ifconfig` it reports back the correct information.

    > What do you think, could this indicate a problem with nic2 or its
    > driver? Are nic1, nic2, and nic3 all the same model and using the same
    > drivers? Have you tried replacing nic2 with a nic you know to work, or
    > if you know nic3 to be working, temporarily with nic3?

    All three cards are Linksys LNE100TX (Tulip), all purchased around the
    same time. I have not tried using the third nic in place of the first
    one. The second nic---the one assigned the secondary IP address and
    taking over the first nic's---has been tested completely in place of the
    first nic, and in that case, though it worked, outside requests were not
    able to come in. Odd, since the MAC is constant. You'd think that if
    outside requests are supposed to come in to the first IP, and the second
    one is able to receive these while accepting both the first AND second
    IP, that it'd also be able to get it while using ONLY the first IP, but
    that's not the case. It's only worked "normally" with the first NIC down
    and the second NIC up, receiving on behalf of both. 

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