Saturday, February 7, 2009

DefaultRefreshInterval Registry Key

This registry key specifies the duration during which the active directory integrated dns zone can update timestamp of dns resource records. During DefaultRefreshInterval period Scavenging settings doesn't have effect on dns zones.

Key Name: DefaultRefreshInterval
Type: dword
Default: 7 days.
Functionality: Specifies the duration of refresh interval.
Location: "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\dns\parameters".

When a new active directory dns zone is created, the system copies the DefaultRefreshInterval reg value in the new dns zone's sub key entry DefaultRefreshInterval.

Note: Direct changes to this key will be effective only after rebooting the server.

To change DefaultRefreshInterval with having to restart the system, do the following.

1. Assume the dns server name is "dnserver".
2. Open DnsManger using the command dnsmgmt.msc.
3. In the console tree, right click on the server node "dnsserver" and click "set Aging and Scavenging for this server".

In the server Aging/Scavenging properties dialog, select the option "DefaultRefreshInterval" , set the interval click apply and click ok button.

Click ok on confirmation dialog.

Relevant Posts:
set defaultrefreshinterval on command prompt


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