Mailinglist Archive: opensuse (3637 mails)

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Re: Which nic is which?
  • From: Jim Osborn <jimo@xxxxxxxxxx>
  • Date: Sat, 19 May 2001 23:31:04 -0700 (PDT)
  • Message-id: <200105200631.XAA02492@xxxxxxxxxx>
Thanks for the reply, Stuart.

After tearing the nics out and examining them, I reinstalled
just the old nic, trying to get back to where I was.

The numbers from ifconfig eth0 are:
HWaddr 00:00:21:D1:B7:71

And from a label on the non-component side of the nic:
On the component side I found, spread around here and there:

Any suggestions translating that HWaddr to any of those
numbers on the card? I get 567,392,113 decimal for that hex addr;
which doesn't look anything like any of those things printed on the card.
Reversing the byte order makes things no less bizarre.

The new nic had less numbering. The component side tag said:
and stamped directly on the board:

And on the component side I found:
K0236016 V1.1

There must be a secret decoder ring that translates some of that
to the HWaddr, but I don't seem to have it... Since ifconfig is
somehow able to poll the card for its HWaddr, there must be a
way to query the thing. I guess I can stick the nics in the
machine one at a time, boot up, look at ifconfig, write it down.
but you'd think there'd be a more elegant way.

If anyone has a hint, I'd love to hear it.



>From: "Stuart Powell" <stuart@xxxxxxxxxxxxxxxxxxxx>
>You mentioned the 6byte code in your post. That code is the MAC address you
>may have heard talk of. This code is unique to each card, and is in HEX
>format. I have a 3COM 3C900B here with a HW address of 00-50-DA-BA-EC-A6.
>The first three numbers are a manufacturer's code. Many manufacturers have
>more than one code. The last three numbers make the card unique.
>This number is printed prominently on the card itself. Write down the
>numbers you see on screen, then whip out the cards and look for those
>numbers. Then put the cards back into the machine, keeping an eye on which
>card is in which slot. This way, you'll know which cable goes where once
>you configure your interfaces.

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