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  • 1 DC for Multiple Subnet

    I have single dc for multiple subnet.
    1. All subnets have been added in the default site .
    2. Computer joins the domain successfully but with FQDN ( not with netbios name ).
    3. Computer joins from the same subnet successfully register its account in DNS.

    The problem is

    Computer joins from different subnet joins the domain successfully but unable to register its account in DNS.

    Any help would be highly appreciated.

  • #2
    Re: 1 DC for Multiple Subnet

    The computer in the separate subnet, where does it et it's DNS ervers from.
    Are they correct DNS server addresses?
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    • #3
      Re: 1 DC for Multiple Subnet

      single DNS ( DC server itself ).
      Client computer are using DC DNS as single DNS address.

      As already informed that computers able to resolve address and join the domain.

      The problem is with DNS account registration ( automatically )

      Comment


      • #4
        Re: 1 DC for Multiple Subnet

        How are you registering with DNS?

        If you run ipconfig/registerdns, does it work?
        Tom Jones
        MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
        PhD, MSc, FIAP, MIITT
        IT Trainer / Consultant
        Ossian Ltd
        Scotland

        ** Remember to give credit where credit is due and leave reputation points where appropriate **

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        • #5
          Re: 1 DC for Multiple Subnet

          As per my understanding computer account should be added automatically when we join the computer with the domain.

          Else i have also tried ipconfig /registerdns. still not success.

          Comment


          • #6
            Re: 1 DC for Multiple Subnet

            Adding a computer to the domain does nothing to DNS - you will need to register the record separately.
            This is either when assigned an IP address by DHCP - directly from the client for 2000 and above and via the DHCP server for NT4 and below (someone correct me if that is wrong), or manually by IPCONFIG/REGISTERDNS

            Can you access the DNS server from the clients - e.g. does ping by name return the correct IP address?

            What about NSlookup?

            From the information so far, you have a routing problem - what device is between the subnets?
            Tom Jones
            MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
            PhD, MSc, FIAP, MIITT
            IT Trainer / Consultant
            Ossian Ltd
            Scotland

            ** Remember to give credit where credit is due and leave reputation points where appropriate **

            Comment


            • #7
              Re: 1 DC for Multiple Subnet

              Please see my comments below

              Adding a computer to the domain does nothing to DNS - you will need to register the record separately.
              You mean by joining client computer will not add dns ( a record ) automatically, we have to add a record for computers manually.

              manually by IPCONFIG/REGISTERDNS
              The above command did not add the A record of client computer in DNS server


              Can you access the DNS server from the clients - e.g. does ping by name return the correct IP address?
              Yes DNS server is accessible and resolving properly

              What about NSlookup?
              yes it is working properly

              From the information so far, you have a routing problem - what device is between the subnets?
              between two subnets we have juniper firewall but we allowed all udp and tcp ports in security policy between DC and client in both direction.

              Comment


              • #8
                Re: 1 DC for Multiple Subnet

                Are you able to put some sort of packet sniffer (Wireshark or similar) into the network and see what is happening when you manually register a DNS record?

                Note I did not say you had to add a record manually as you can specify in your DHCP server that the client should register automatically with DNS when it gets an IP address. If you are only using static addresses then, yes, manual registration is required either by IPCONFIG or by ticking the advanced option when you enter the IP address
                Tom Jones
                MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
                PhD, MSc, FIAP, MIITT
                IT Trainer / Consultant
                Ossian Ltd
                Scotland

                ** Remember to give credit where credit is due and leave reputation points where appropriate **

                Comment

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