Windows Network/MAC Addresses

By MattG ยท 6 replies
Mar 15, 2004
  1. Ok guys here is a delima i have, im doing some work for a High School and they want to use a Windows 2003 Server to DHCP addresses out.

    Done that. HOWEVER, the problem that lies, is all the computers are getting the same IP address, and all there MAC addresses are set to Zero's (0000) this is the problem. All the computers still work...but only one at a time..because it thinks its the same computer..etc.

    Has anyone had this problem before? If so, please help..kinda annoying, heh.


  2. Didou

    Didou Bowtie extraordinair! Posts: 4,274

    Go to Administration Tools -> Services & Applications -> DHCP -> <scopename>

    Check to see how many addresses your scope can allocate.

    You should also see the Unique ID ( MAC address ) for each client that connects in the Adress Leases section of that same scope & you can create one reservation per client if you wish.
  3. MattG

    MattG TS Rookie Topic Starter Posts: 140

    The cards by deafult have no MAC addresses...all zero's. Even with no DHCP...just set to auto.

    ONboard SiS 900 NIC, on a Micro ATX MSI board.
  4. Didou

    Didou Bowtie extraordinair! Posts: 4,274

    The MAC address isn't dynamic, it's hardware & set by the manufacturor. You can change it with a procedure similar to a BIOS flashing.

    If you type ipconfig /all at a command prompt, you will see the MAC address next to the mention Physical address.
  5. MattG

    MattG TS Rookie Topic Starter Posts: 140

    Yup done all that, and they are still all 0's. Searched the BIOS for something (they are onboard) and there is nothing.

    Any other ideas?
  6. Goalie

    Goalie TS Booster Posts: 616

    Ok.. get us the exact mobo name if you can, and your bios version...

    Chances are this is a nic which has soft-coded MACs, and you need to set them. Those types of nics are getting rarer these days, but still out there.
  7. MattG

    MattG TS Rookie Topic Starter Posts: 140

    Alright - i wont be back there til wednesday. I will post back then.
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