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Network and Classroom Management Thread, Sync DNS and DHCP in Technical; We now have AB Tutor and I have now found out our DNS and DHCP are out of sync (some ...
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    TechSupp's Avatar
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    Sync DNS and DHCP

    We now have AB Tutor and I have now found out our DNS and DHCP are out of sync (some pc's not maping the correct name to PC location in AB Tutor). Two questions really,

    1) is this a simple task to rectify so they are always in sync
    and
    2) are there any other issues this could have been causing

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    How long are your dhcp lease times?

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    that I dont know, its been a case of if it aint broke dont fiddle so never looked, where would I find that out?

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    I presume your windows.

    In dhcp -> domain -> Scope - (right click) > properties, we have ours set at 2 days.

    Also if you have multiple scopes check each as you can have different lease time per scope.

    Also check your DNS, in forward and reverse domain and arpa (right click) properties -> name server tab and ensure all name servers are listed with correct ips.
    Last edited by mikeyd101; 19th December 2013 at 10:24 PM.

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    Also clear you DNS out every now and again - never hurts to remove old client names which no longer exist.

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    Or setup dns scavenging.

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    I don't control DHCP as we have a 'managed' CISCO router/switch set-up that deals with it, but our servers control DNS and I have noticed similar issues. There are a few old threads on here about it.

    Here's mine:

    DNS issues. HELP!

    You can check DHCP lease times from any workstation (I think) using ipconfig /all in the output it returns will be lease obtained and lease expires. Ours is 24 hours, but it's a bit more complex than that and I am still trying to find the optimum.

    Kol

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    Quickly heckled on a PC and DHCP lease set to 8 days. Another job for the New Year List

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