Announcement

Collapse
No announcement yet.

Changing DHCP start IP address

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Changing DHCP start IP address

    Hi,


    We are on a Win 2003 AD domain and running a DHCP Server on the Domain Controller.

    There is only one DHCP scope that has the following start & end address setup.

    Start Address : 10.30.10.100
    End Address : 10.30.10.199
    Subnet Mask : 255.255.255.0

    We have few spare addresses starting from 10.30.10.51 to 10.30.10.99 that are not being used.

    Now, I want to use these addresses for additional desktops and laptops.

    The following MS KB tells us that we can simply add the new address to our existing scope.
    http://support.microsoft.com/kb/255999

    It also mentions the following

    Note
    In earlier versions of Dynamic Host Configuration Protocol (DHCP), you had to extend the Start Address or End Address in increments of 32. This is no longer the case if you are running Microsoft Windows NT 4.0 Service Pack 6 or later.

    I am assuming that I need to deactivate the existing scope, change the new start address to 10.30.10.51 and reactivate the scope.

    Has anyone done this and encountered any problems?

    Please advice if any further steps are required or any other precautions to be taken.



    Cheers,

    Pankajb
    Last edited by biggles77; 27th January 2009, 01:36. Reason: Fix formatting. Grrrrrrrrrrrrrrrrrrrrrr!!

  • #2
    Re: Changing DHCP start IP address

    Do you need some new glasses?

    Anyway, no, I've done this earlier and had not any problems.
    I'm not sure if you still need to deactivate the scope but it can't hurt.
    Clients will still be able to continue there work.

    Ps, I would make sure if create a backup of the scope in case of data corruption.
    It wouldn't be the first time I've seen a corrupt DHCP database.
    Marcel
    Technical Consultant
    Netherlands
    http://www.phetios.com
    http://blog.nessus.nl

    MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
    "No matter how secure, there is always the human factor."

    "Enjoy life today, tomorrow may never come."
    "If you're going through hell, keep going. ~Winston Churchill"

    Comment


    • #3
      Re: Changing DHCP start IP address

      you don't need to deactivate the scope. Just access the scope properties and change the start and end addresses. Nothing more needed.

      Comment


      • #4
        Re: Changing DHCP start IP address

        Hi joeqwerty & Dumber,

        I just posted this mail from my office and thought I would re-check the forum before going to bed at night.

        Wow !!!!!!! what a prompt reply........ AWESOME ......You guys are great ........

        As suggested, I have changed the start address and everything is working fine.

        Trillion thanks for the help.

        Cheers,

        Pankajb

        Comment


        • #5
          Re: Changing DHCP start IP address

          Glad to help. Have a good night.

          Comment

          Working...
          X