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Discussion Starter #1 (Edited)
OK, I'm lost on this one....

I shut down my computer (2000 Server) and restarted it in XP (like I've done a million times) I then shut it down again and restarted it in 2000 Server.

First I noticed that I didn't have internet access. Then I realized I couldn't see any of the other computers on my network. Hmmmmm.....

So I tried all the normal stuff...uninstalled and reinstalled the NIC (RealTek 10/100) same with the drivers, changed cables...tried changing my static address to DHCP and releasing and renewing, uninstalling and reinstalling TCP/IP...blah blah blah...

I ran IPCONFIG/ALL and realized my physical (or MAC) address was reading all zeros! I've never seen this before. I tried restarting in XP (where the problems all began, thinking XP had reconfigured something) and I still had the same problem in XP.

So, here I sit...my main computer (thankfully not my webserver) can't communicate with any of my other computers and can't get on the web.

Has anyone ever had their physical address revert to all zeros before? Have I been fried by MS for all my bad deeds?

Any ideas from the rest of you tech-heads?

I saw something about DHCP Media Sense having a problem in 2000...but I've never had a problem before. Plus, I don't use DHCP anyway.

HELP???!!!
 

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Do you have an extra network card? Might be worth a try swapping it out. I thought the MAC address was hard coded onto the card by the manufacturer... guaranteed to be unique.. so if your MAC address is all 0's maybe your NIC is fried.
 

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Discussion Starter #3
I do have an extra 3Com on a machine I don't use much. I was just wondering if there was a known issue that might prevent me from having to swap em out.

I'll probably end up doing that later on.........:bored:
 

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Did you try the Microsoft solution?

Take out the card and reseat it. Reboot. Viola.

That's my first step...
 

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Good idea thought I had a bad memory chip one time and it ended up being as simple as taking it out and reseating... never heard of a NIC failing...
 

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Does the card work correctly under 2000 Server?

I'm inclined to think hardware failure - either that or reseat the card.
 

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Considering that it's a RealTek ($5-$8 per NIC) you should just go grab a replacement. I'd not want to deal with potential flakiness considering that a replacement NIC costs less than a movie ticket.
 

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Discussion Starter #10
Ding ding ding...

Pulled card, reinserted in empty slot...bingo. works like a charm.:wink:
 

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Intrepidatious said:
Pulled card, reinserted in empty slot...bingo. works like a charm.:wink:
Sorry I got here so late. I may have been able to save you the trouble of pulling and reinserting the card. However, that had the same end result.

Most newer NICs pull their MAC or BIA (burned in address) from ROM at power up and store it in an area of RAM onboard the NIC. Now, this area of NIC RAM can be re-written (or corrupted) by software. As a matter of fact, some NIC manufacturers include a utility that allows you to change your NIC's "soft" MAC address at will.

Here's the rub... this "soft" MAC address remains until the NIC is power cycled. And, due to things like ATX power supplies and Wake-On-LAN capabilities, most newer NICs are never really powered off until until you either remove and re-insert them OR you simply unplug the computer from the wall (not just turn it off).

If you do the latter, unplug the system from the wall and then press the power button as if to turn the system on. This will discharge any leftover potential in the system's capacitors. Otherwise, you might have to leave the system unplugged for a few minutes before the NIC consumes the remaining power.
 
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