NoteHKLM\SYSTEM\CurrentControlSet\Services\DNS\Zones\<Zone-name>
| Data type | Range | Default value |
|---|---|---|
| REG_DWORD | 0x1 - 0xFF hours | 0xA8 (168 hours = 1 week) |
Specifies the duration of the refresh interval for a resource record. The refresh interval is the time during which the server can update the timestamp of a resource record. During its refresh interval, a record is protected and cannot be deleted by the scavenging feature of the DNS server.
This entry and related entries configure the scavenging feature of the DNS server. The period specified in this entry begins when the no-refresh interval (the period during which timestamps cannot be updated) for a record ends. When the time specified by this entry expires, the scavenging feature of the DNS server can delete the record if it is out of date.
You can specify the duration of the refresh interval for a zone by using three different methods. All of these methods change the value of RefreshInterval.
RefreshInterval directly stores the value of the Refresh interval box on the Aging page of the DNS console.
The default duration of the refresh interval for a new zone is
stored in the value of DefaultRefreshInterval, and is copied to the
value of RefreshInterval when a new
DefaultRefreshInterval stores the setting in the Server Aging/Scavenging Properties dialog box.
When you select the Apply these settings to the existing Active Directory-integrated zones check box on the Server Aging/Scavenging Confirmation dialog box, the value of DefaultRefreshInterval is copied to the value of RefreshInterval and replaces any existing value.
To change the value of this entry, use the DNS console. Right-click the name of a zone, click Properties, click the General tab, and then click the Aging button. This entry stores the value in the Refresh interval field.
DNS reads its registry entries only when it starts. You can change entries while the DNS server is running by using the DNS console. If you change entries by editing the registry, the changes are not effective until you restart the DNS server.
Note
This entry is used only when scavenging is enabled on the server (as specified in ScavengingInterval) and on the zone (as specified by the value of Aging). By default, scavenging is disabled.
Tip
The refresh interval must be long enough to allow all servers that maintain resource records to update their timestamps. Because the DHCP server is usually the last server to update its records, you can monitor DHCP records to make sure you have scheduled enough time for updates. If records are being scavenged too soon, use the DNS console to set this value back to the default value of 1 week (168 hours).
Caution
DNS adds this entry to the registry when you use the DNS console to configure scavenging. Do not edit the registry to add, delete or change this value.
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