Network inside of a network, domain and DHCP help

Discussion in 'Windows Networking' started by Jason Mondanaro, Jun 21, 2005.

  1. Hello,

    I have a testing and demonstration network of one w2k3 PDC/Exchange and
    another w2k3 Application/SQL machine. I want to know if I can get these
    machines to communicate properly no matter what host network they are
    attached to (it travels a lot!) Right now I am stuck with the following to

    1) If I configure the machines to have static IP addresses then each time I
    move it I need to rejigger the addresses to work on the new host network
    which is most likely configured for DHCP anyway.
    2) If I configure the machines to use DHCP they get good addresses, can
    reach the internat and see each other via NetBIOS, but many of the domain
    specific configuration stuff which seems to want to use the FQN for my
    network won't resolve because the host DNS doesn't know about my domain

    So it seems like I should setup DNS on my PDC but I don't know if its
    possible for the second machine to register with the DNS without the IP
    being static.

    Is there some direction I can head that will not result in my having to nail
    down one of the machines with a static IP?


    Jason Mondanaro, Jun 21, 2005
    1. Advertisements

  2. The short answer is "No, you cannot".

    The network is part of the "environment" that the machine operates in. You
    cannot move from one "environment" to another "environment" without some
    amount of reconfiguring of the machine.

    The alternative is
    Phillip Windell, Jun 21, 2005
    1. Advertisements

  3. Jason Mondanaro

    Neteng Guest

    Could he use secondary addresses on each NIC? Meaning that the 'primary'
    address would be DHCP and the secondary address would be a statically
    Neteng, Jun 21, 2005
  4. mmm.....haven't tried it, but I don't think so.

    Looking at the machine I am sitting at,..all the IP config stuff in the GUI
    is greyed out when it is DHCP enabled,...even in the Advanced section.

    If there were two Nic you could have one setup for each network and then rig
    up "hardware profiles" for each network with only the one corresponding Nic
    enabled for the network you are using.

    That still won't adjust for domain membership but it should help some. But
    Netswitcher that handles all that for you is only $15 USD.
    Phillip Windell, Jun 21, 2005
  5. Jason Mondanaro

    Neteng Guest

    I can't test this, but what about adding a loopback adapter to each machine
    and assigning it an IP? As long as the real NIC is plugged in, it should
    work. You would probably want to use an address such as and
    That address is public, but not owned by anyone and will not conflict with
    RFC1918 addresses.

    Neteng, Jun 21, 2005
  6. I don't see any purpose for that.
    Phillip Windell, Jun 22, 2005
  7. Jason Mondanaro

    Neteng Guest

    It would allow communications across the network, while still
    allowing DHCP on the real NIC.
    Neteng, Jun 22, 2005
  8. mm..well maybe,..I don't know. I'll probably have to call it quits on this
    thread. I cleaned up the newreader and unintensionally removed the past post
    of the thread and I don't even remember what we were talking about now.
    Phillip Windell, Jun 22, 2005
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.