DHCP not updating DNS?

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This topic contains 6 replies, has 7 voices, and was last updated by Avatar Anonymous 4 years, 2 months ago.

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    Spuddy
    Member
    #157527

    Hello,

    We have started to have lookup problems in out network. When a new client gets an IP address, DHCP doesn’t update DNS with the record.

    Windows 2008 R2 Server.

    The DHCP and DNS are on the same box (which is also the primary DC).

    I have checked the event viewer logs for the DHCP and DNS server but nothing is present?

    Any ideas?

    Avatar
    Ossian
    Moderator
    #185959

    Re: DHCP not updating DNS?

    Normally it is the client which updates DNS — unless it is old enough that it will not, in which case the DHCP server will do so

    JeremyW
    JeremyW
    Moderator
    #270174

    Re: DHCP not updating DNS?

    Are you getting duplicate records or multiple records for the same IP?

    If so you may want to enable aging and savaging on the DNS server. This should clean out the old records that clients fail to unregistered.

    Avatar
    Virtual
    Member
    #334109

    Re: DHCP not updating DNS?

    Have you upgraded DHCP at some point and DNS?

    This is worth a review.

    http://technet.microsoft.com/en-us/library/cc787034(WS.10).aspx

    It may be that the DHCP server isn’t the owner of the DNS records.

    Avatar
    noor_salafi
    Member
    #353610

    Re: DHCP not updating DNS?

    Have you tried checking the DNS dynamic updates registration credentials in the Advanced tab of your DHCP server properties. Perhaps it could be an incorrect username / password or a locked account ,etc

    Avatar
    Anonymous
    #376231

    Re: DHCP not updating DNS?

    How to help you determine the cause of the issue and fix is going to determine on whether or not you have your DHCP server(s) configured to update DNS on behalf of your clients. Can you validate this information?

    For Win2000 and later, my preference is to allow clients to do so nativley. However, many admins configure DHCP to register regardless.

    If you are using DHCP for registration, it could be rated to a change in config, lack of permissions, DHCP service account, dnsproxyupdate group membership, etc. .

    Also ck on the DNS zone on if for dynamic updates.

    Again, the knowing your setup would help on next steps.

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    studio_two
    Member
    #363534
    noor_salafi;n410046 wrote:
    Have you tried checking the DNS dynamic updates registration credentials in the Advanced tab of your DHCP server properties.

    Many Thanks. That certainly worked in my case. I can honestly say that I’ve never even noticed those settings before.

    Regards,
    Stephen

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