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Windows Server 2012 Thread, new DNS server not in DHCP config in Technical; I already have 2 2003 boxes running ad and DNS both were already in DHCP as DNS servers. I added ...
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    chazzy2501's Avatar
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    new DNS server not in DHCP config

    I already have 2 2003 boxes running ad and DNS both were already in DHCP as DNS servers.

    I added a 3rd domain controller (a 2012R2) I used the wizard (DC GC DNS), it did complain about not being able to find the DNS authority but as I have a .local domain I think this is normal.

    I checked DHCP today and found that it was not added as a DNS server? is this normal as I have 2 already or is this not automated and I'd have to do this by hand?

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    Michael's Avatar
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    DNS will not replicate to other DCs by default. You can either set any available domain controller (recommended) or specify IPs or server instances where DNS is allowed to replicate to.

    You need to do this per server, per zone, so doing it via MMC makes a lot of sense.

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    Quote Originally Posted by chazzy2501 View Post
    I checked DHCP today and found that it was not added as a DNS server? is this normal as I have 2 already or is this not automated and I'd have to do this by hand?
    Are you saying your new DNS server isn't being advertised to DHCP clients?
    That's perfectly normal. DNS servers are not advertised to DHCP clients unless you choose to add them to the list of scope or server options on the DHCP server. On a busy network you might want to plan which DNS servers are used by clients for load balancing purposes, for example.

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    chazzy2501 (4th July 2014)

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    The event log on the new DC said that the DNS service was waiting for the initial sync before it could start and now says it's started? So the wizard must have organised that.

    I was wondering why the DHCP service on the 2003 machine hasn't added the new DC and a DNS server yet?

    or is it supposed to?

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    Quote Originally Posted by chazzy2501 View Post
    I was wondering why the DHCP service on the 2003 machine hasn't added the new DC and a DNS server yet?

    or is it supposed to?
    There is nothing to 'add' to DHCP for a domain controller. DNS is your choice as to whether or not to add it, but two servers is probably adequate for clients.

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    Quote Originally Posted by Roberto View Post
    There is nothing to 'add' to DHCP for a domain controller. DNS is your choice as to whether or not to add it, but two servers is probably adequate for clients.
    Sure, it's just I'll want to loose the older servers soon, I'll add the new DC in the DHCP info.

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    it doesn't work! Well if I manually set a client to use the new DC as a DNS server it's fine. I then added it to the DHCP options and put it to the top of the list. When I ask clients to release renew their DHCP address only the old DNS servers show up?

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    Are you adding this under server options or directly onto a subnet?

    Does the subnet you're releasing\renewing IP's on have any DNS servers configured directly under it's scope options?

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