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Two subnets joining one domain

Salman 21 Reputation points
2021-01-02T08:28:07.41+00:00

I have two different subnets in my internal network for example 10.1.1.0 for some clients and 172.16.0.0 for others and I have one AD server which installed Windows server 2016. I want both of them to join one domain and the server has to be a DHCP server for both of them, since the server has only one NIC it can either be part one of these networks. So I wanna know is that possible and IF it is how, I mean the steps? Thank you

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  1. Anonymous
    2021-01-04T08:13:42.037+00:00

    Hi ,

    As far as I know, you can.

    Joining AD domain (when routing is ok) is DNS dependent. Once you have your network segments routing between them, joining the domain requires the proper clients DNS settings. All of the PCs that will need to join the domain will need to point to a DNS server that can resolve the necessary AD related records.

    Don't forget to add new subnet to the Active directory Sites and services.

    Best Regards,

    Candy

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  1. Youssef Saad 3,416 Reputation points
    2021-01-02T09:42:57.553+00:00

    Hi @Salman ,

    If you have one NIC on your DHCP server, I think you have to configure DHCP relay agent, refer to the following:

    https://social.technet.microsoft.com/Forums/ie/en-US/7d76e12f-9e47-4cc4-a280-2f9695de0b11/single-dhcp-server-managing-multiple-subnets?forum=winserveripamdhcpdns

    https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc771390(v=ws.11)?redirectedfrom=MSDN

    Regards,

    Youssef Saad | New blog: https://youssef-saad.blogspot.com
    Please remember to ** “Accept answer” ** for useful answers, thank you!

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  2. Anonymous
    2021-01-04T02:25:51.42+00:00

    Hi ,

    You need to configure DHCP relay agent to connect to new subnets.

    -If your router supports DHCP relay, you will need to setup the IP helper address on your router to point to the IP of the DHCP server. This will enable BOOTP forwarding on the router and allow the DHCP requests to be passed through the VLANS to the correct subnet/ DHCP server.

    -On your DHCP server setup a scope for each subnet. Make sure you authorize the DHCP server in AD by right clicking it in the DHCP MMC console and selecting "authorize".

    Best Regards,

    Candy

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  3. Salman 21 Reputation points
    2021-01-04T07:46:52.08+00:00

    @Anonymous I get the DHCP and DHCP Relay agent part, but I still want to know that if that the clients of the two VLANs/Subnets can join the AD domain and get their credentials there...
    help me kindly,
    Thanks
    Isse

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