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  • IP Change

    Hi Guys.

    I am having a general hand on networking. Mentioning below my problem.

    OS : Windows Server 2003 with AD installed

    My server IP address is 192.168.100.1 & subnet is 255.255.255.0. Systems on my network will cross 254 in couple of weeks.

    I just want to know that which will be the easiest way to include the new systems in my domain in case systems are above 254.

    Thanks.

    Regards
    Sameer

  • #2
    Re: IP Change

    quickest, easiest way is to change your subnet mask to 255.255.0.0 instead of 255.255.255.0. THis means a classB, instead of ClassC. I'll let you work out how many useable addresses you'll have then.

    alternate options would be: separate your network. Leave all the servers, routers, printers, switches, infrastructure, on 192.168.0.0/24
    Create a new subnet, 192.168.10.0/24 and put all your workstations on this address.
    Configure appropriate routing between the subnets, and you're good to go.


    do a search for "subnet calculator" and you'll get some more info..

    alternately - you could supernet, or cidr, whatever it's called, and plug the two discrete ranges above into a single routable network, without having the need to use a class B netblock..
    Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

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    • #3
      Re: IP Change

      Thanks.

      As of now, I can plan option 1 to change the subnet. May be easiest one for me.

      I have one more query. Active directory is already installed on server & workstations on domain are configured accordingly. Changing subnet on server & client will cause problem? or anything I have to do before/after changing subnet?

      Regards
      Sameer

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      • #4
        Re: IP Change

        hopefully your workstations are configured with DHCP, so all you need to do is change the scope option, and make sure every computer renew's it's address. You could enforce this by decreasing the lease period to 4 hours or something like that.
        Allow a while for this to take affect. (Alternately, hire some floor walkers to come in on friday night, and do "ipconfig /release | ipconfig /renew" on each computer, or script it.

        With the servers, you'll just have to do it manually, or again, write a netsh script to do it.


        it should not affect active directory itself, or dns...
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        • #5
          Re: IP Change

          My network is not configured with DHCP. I will plan it to change manually both on Server & Client. Definately on Friday night.

          Regards
          Sameer

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          • #6
            Re: IP Change

            Wow. that's going to be fun..
            Why not write a netsh script.. take a look at this:
            http://www.petri.com/configure_tcp_ip_from_cmd.htm

            that way, if you do all your prep.. you can fire off the script in startup files, cause a reboot on every computer on Friday night, and then deal with problems on Monday morning..
            Also - 254 devices, statically addressed.. strongly, strongly, strongly, consider taking a look at DHCP. It's designed exactly for situations like that.
            Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

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            • #7
              Re: IP Change

              Definately will look for suggested script on Petri.co.il (One of My favourites).

              To go for DHCP instead Static, I will have to look into configs on Firewalls, RFs etc.

              But your ideas have put light on a good network configuration at my place.

              Regards
              Sameer

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              • #8
                Re: IP Change

                when you're ready, come back and we can discuss dhcp a bit more.. because dependant on what your firewall concerns are, they can probably be managed...

                you don't have to dynamically assign dynamic addresses to everything... you can dynamically assign a static address to something (called a reservation) if need be..
                Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

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