Multiple physical ethernet connections

Discussion in 'Virtual PC' started by Mike Robins, Nov 28, 2006.

  1. Mike Robins

    Mike Robins Guest

    Hello all,
    I'm running virtual PC 2004 hosted on an XP PRO PC.
    The PC has two ethernet connections, one on the motherboard (Intel
    PRO/100VE) and one on a Netgear NIC (National Semiconductor DP83815).
    The two networks are entirely separate - one is a general purpose corporate
    LAN, connected to the internet, the other is an experimental LAN used for
    testing VoIP equipment. Neither network uses DHCP - the IP addresses are
    configured on each machine.
    I've installed NT4 SP6 as a virtual machine and would like to be able to
    address both of these LAN.
    When NT4 boots it shows a single DECchip 21140 PCI card under Control panel
    / network.
    If I change the settings in virtual PC console, so that I only use one
    network, and enter the appropriate IP address within the NT4 network
    configuration, then each network runs just fine. I get a new MAC adress and
    IP address on that network, which seems to work OK in conjunction with the
    network stack on the host PC. I'm not quite sure how the physical ethernet
    connection manages to have two MAC at the same time, but whatever.

    But, ... how do I get both networks to work at the same time?
    Mike Robins, Nov 28, 2006
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  2. Mike Robins

    Robert Comer Guest

    All you have to do is add another NIC to the VM through the Virtual Machine
    settings and assign it to the NIC that accesses the other LAN, then when you
    boot up NT4 in the VM, add the new NIC, switching to the newer driver for
    the DECChip NIC that is contained in a virtual floppy in the c:\program
    files\Microsoft Virtual PC\additions\NT4 Network Driver.VFD, then configure
    IP address as normal. (The newer driver allows more than on NIC when
    running NT4 in a VM.)
    Robert Comer, Nov 28, 2006
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  3. Mike Robins

    Mike Robins Guest

    Excellent! Yes, that fixes the problem. Thank you for the prompt reply.
    Is this documented anywhere?
    Mike Robins, Nov 28, 2006
  4. Mike Robins

    Robert Comer Guest

    You're welcome, glad I could help!

    The new NT4 NIC driver is in the readmesp1.htm file that's in the
    documentation folder for Virtual PC. (c:\program files\Microsoft Virtual
    Robert Comer, Nov 28, 2006
  5. Mike Robins

    Penman96 Guest


    I'm having the same issue running Virtual Server 2005 R2 SP1 Beta2 (32-bit).
    With this application the NT4 Network Driver.VFD release date is 17 November
    2005, 05:48:24. I have a NT4.0 Server SP6a virtual machine that needs to
    have two emulated ethernet ports. I am able to install two DEC 21140 cards
    and assign IP addresses to them. When installing the second NIC I get a
    window warning that "A network card of this type is already installed on the
    system" OK'ed that, and rebooted.

    Once the VM is back up, the NIC's are still showing up in the network
    configuration window, where the TCP/IP parameters are entered. However a DOS
    command ipconfig shows only one card, and the system cannot join it's domain.
    I have looked around for a newer version of NT4 Network Driver.VFD but I'm
    not having much luck so far.

    Any help would be appreciated.
    Penman96, Feb 6, 2007
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