Need help with pointer records

Posted on 2007-10-19
Last Modified: 2007-10-19
The pointer records in DNS aren't updating properly.  I have set scavenging days from anywhere to 1 to 8 days.  The problem presents itself when I am trying to use windows dns to locate the computer name based on the ip address.  Not all records are updating.  I have a fairly stable dhcp environment and I am wondering if using dhcp reservation is a valid option?
Question by:cmkeur
    LVL 70

    Expert Comment

    by:Chris Dent

    When you say Scavenging Days you mean the Aging Intervals on the Reverse Lookup Zone?

    How long did you allow Aging and Scavenging to kick in on the Reverse Lookup Zone?

    Does DHCP update DNS for you? How long is the DHCP Lease Time?


    Author Comment

    Yes i mean agin/scavenging intervals.
    no-refresh set at 4 days
    refresh interval set at 8 days
    in dhcp/dns tab all check boxes are checked and the radio button for always dynamically update dns a and ptr records in active.

    those options are identical on the scope and the server it self.  
    lease is limited to 2 days
    LVL 70

    Accepted Solution


    Ahh okay, so the potential for addresses to swap around is much greater than the ability of the DNS Server to clean them out.

    Even after you set them you must wait a while before the changes you've made kick in.

    Either a higher Lease Time (12 days if you're keeping the 8 and 4), or much lower No-Refresh and Refresh Intervals would seem appropriate (1 day each).

    You wouldn't want to set the Aging intervals lower than 1 day each or it'll scavenge the Service Records.

    Did you also set the Scavenging Period (Advanced DNS Properties)? Ideally that should be 1 Day (so the process runs once a day).


    Author Comment

    for now i'll set the aging/scavenging to 1 day and monitor the progress then i'll change it to 12 or so and monitor the progress and see what gives better results.

    The scavenging period (advanced dns) wasn't set.  i set it to your recommended value of 1.  Thanks

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