Force workstation to use a specific DHCP server ?

Discussion in 'Server Networking' started by Tang, Dec 2, 2009.

  1. Tang

    Tang Guest

    Hello!

    Does anyone know of a way to force a workstation to use a specific DHCP
    server ? I'm just into a situation where a Windows Server 2003 have DHCP
    server active and the phone system also have DHCP server active.

    Several workstations keeps getting their IP information from the phone DHCP
    server rather than the Windows 2003 DHCP server.

    I know the real fix is to kill the DHCP server on the phone system but our
    phone provider need to use the DHCP server for the phone configuration.

    Any ideas are welcome.

    Thank you !

    Tanguy Brasseur
    Tang, Dec 2, 2009
    #1
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  2. "Tang" <> wrote in message
    news:...
    > Hello!
    >
    > Does anyone know of a way to force a workstation to use a specific DHCP
    > server ? I'm just into a situation where a Windows Server 2003 have DHCP
    > server active and the phone system also have DHCP server active.
    >
    > Several workstations keeps getting their IP information from the phone
    > DHCP
    > server rather than the Windows 2003 DHCP server.
    >
    > I know the real fix is to kill the DHCP server on the phone system but
    > our
    > phone provider need to use the DHCP server for the phone configuration.
    >
    > Any ideas are welcome.
    >
    > Thank you !
    >
    > Tanguy Brasseur


    You already know the answer. And no, you can't make a machine use a specific
    DHCP. You can play around with DHCP vendor and other options, but to please
    the phone vendor? Ask the phone vendor what specifically is the phone system
    looking for DHCP options-wise.

    If they can't answer that question, then your only course of action is to
    put the phone system on a separate switch with their own subnet. I think I
    would have probably done that just to keep them separate, however I've
    worked in environments with an Avaya phone system on the same subnet as
    other machines, and we simply used Windows DHCP and set specific vendor
    options at Avya's direction in regards how to set it up.

    --
    Ace

    This posting is provided "AS-IS" with no warranties or guarantees and
    confers no rights.

    Please reply back to the newsgroup or forum for collaboration benefit among
    responding engineers, and to help others benefit from your resolution.

    Ace Fekay, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE & MCSA
    2003/2000, MCSA Messaging 2003
    Microsoft Certified Trainer

    For urgent issues, please contact Microsoft PSS directly. Please check
    http://support.microsoft.com for regional support phone numbers.
    Ace Fekay [MCT], Dec 2, 2009
    #2
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  3. Hello Tang,

    You can't do it. The client doesn't know if there is a DHCP server, it broadcasts
    "i need an ip address" and then first come, first serve, is the way it is
    handled.

    What you can do in Windows server 2008 R2 is to define a delay for the answer
    in a split scope environment, but only for Windows server 2008 R2 DHCP servers.
    http://technet.microsoft.com/en-us/library/ee405264(WS.10).aspx

    Best regards

    Meinolf Weber
    Disclaimer: This posting is provided "AS IS" with no warranties, and confers
    no rights.
    ** Please do NOT email, only reply to Newsgroups
    ** HELP us help YOU!!! http://www.blakjak.demon.co.uk/mul_crss.htm


    > Hello!
    >
    > Does anyone know of a way to force a workstation to use a specific
    > DHCP server ? I'm just into a situation where a Windows Server 2003
    > have DHCP server active and the phone system also have DHCP server
    > active.
    >
    > Several workstations keeps getting their IP information from the phone
    > DHCP server rather than the Windows 2003 DHCP server.
    >
    > I know the real fix is to kill the DHCP server on the phone system but
    > our phone provider need to use the DHCP server for the phone
    > configuration.
    >
    > Any ideas are welcome.
    >
    > Thank you !
    >
    > Tanguy Brasseur
    >
    Meinolf Weber [MVP-DS], Dec 2, 2009
    #3
  4. Bill Kearney wrote:
    >> I know the real fix is to kill the DHCP server on the phone system but
    >> our
    >> phone provider need to use the DHCP server for the phone configuration.

    >
    > You cannot have more than one DHCP server on the wire. You MUST kill
    > one or the other.
    >
    > The windows server can be configured to offer anything the phone system
    > needs. Find out what it needs and put that in your windows DHCP server.
    >
    > You will not ever get it working with the two of them running at the
    > same time.


    People very often use multiple DHCP servers for fault tolerance, as long
    as the scopes are properly configured there is usually no problem with
    multiple DHCP servers.

    John
    John John - MVP, Dec 2, 2009
    #4
  5. Tang

    Phil Angus Guest

    Find out what it needs, take the mac address and simply reserve it with that
    IP.

    "Tang" <> wrote in message
    news:...
    > Hello!
    >
    > Does anyone know of a way to force a workstation to use a specific DHCP
    > server ? I'm just into a situation where a Windows Server 2003 have DHCP
    > server active and the phone system also have DHCP server active.
    >
    > Several workstations keeps getting their IP information from the phone
    > DHCP
    > server rather than the Windows 2003 DHCP server.
    >
    > I know the real fix is to kill the DHCP server on the phone system but
    > our
    > phone provider need to use the DHCP server for the phone configuration.
    >
    > Any ideas are welcome.
    >
    > Thank you !
    >
    > Tanguy Brasseur
    Phil Angus, Dec 3, 2009
    #5
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