Microsoft dhcp server not updating dns validating number in perl
Select the General tab, click Aging, and place a check in the Scavenge stale resource records box.
Set your No-refresh interval and your refresh interval, and click OK. Finally, if you need to configure resource record settings, you need to enable the advanced view in your DHCP management console. At this point, you can right-click a record, select Properties, and place a check in the Delete this record when it becomes stale box.
This simply reduces replication traffic between your DNS servers.
The refresh interval means the DNS record timestamp can now be updated at the next dynamic registration cycle. For most scenarios, I’ve found it best to configure the sum of the aging and scavenging periods’ refresh and no-refresh intervals to match the duration of your DHCP leases (e.g.
These could be SRV records for servers like Exchange.
A static record can be created for just about anything.
To enable scavenging on a Microsoft DNS server running Windows Server 2008 or newer, open up your DNS management console and connect to an authorative DNS server. Select the Advanced tab, then place a check in the Enable automatic scavenging of stale records box. (Your scavenging period simply defines how often the process will run, akin to a scheduled task.) This will be the server that performs the scavenging process. To configure aging settings on your zones from within the same DNS management console, right-click the DNS server and select Set Aging/Scavenging For All Zones.
Alternatively, if you prefer to set the values per-zone, right-click the zone and click Properties.
Your DNS record can now exist for a period between 15 – 20 days.These can be simple host (A) records for a device like a network printer or copier.These could be CNAME (alias) records for web servers.If you choose to do this, you need to exercise some caution, as the timestamp (or age) of a static record doesn’t typically change.If you registered a new record 365 days ago, as far as DNS scavenging is concerned, the record is 365 days old, and will be purged.
In nearly every environment I’ve walked into, especially those that are more mature (read: older), DNS contains a plethora of stale entries, whether statically configured and forgotten about or dynamically registered, but never deleted or scavenged.