What is Scavenging?
Most of you reading this will already know what DNS Scavenging is. For those of you that don’t it is a feature of Windows DNS servers which allows you to automate the deletion (scavenge) of outdated DNS resource records. It sounds simple enough and it is once you decipher Microsoft’s cryptic descriptions, but to the uninitiated it is just plain confusing and often leads to unpredictable results. This article will attempt to simplify how DNS scavenging works.
Windows 2000's DNS service supports the scavenging feature, which helps you ensure that DNS records managed by the service are up to date. Scavenging is particularly important if you use Dynamic DNS to automatically register client host names when their IP addresses change, as is often the case when the clients receive address assignments through DHCP.
Scavenging is set in three places on a Windows Server:
Tick the box “Scavenge Stale resource Records” and leave the rest to their defaults.
Here is where the confusion starts. The No-Refresh and Refresh Intervals are not when resource records get scavenged. They are timers for when DNS records become eligible for scavenging. The actual scavenging process is done elsewhere.
It is important to point out that this will only enable scavenging on NEW zones. To apply it to existing zones tick the box (on next pop-up) that says “Apply these settings to the existing AD zones”.
DNS scavenging in Windows 2000
You can configure scavenging through a zone's properties.
Thank you
Asraful islam.
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Most of you reading this will already know what DNS Scavenging is. For those of you that don’t it is a feature of Windows DNS servers which allows you to automate the deletion (scavenge) of outdated DNS resource records. It sounds simple enough and it is once you decipher Microsoft’s cryptic descriptions, but to the uninitiated it is just plain confusing and often leads to unpredictable results. This article will attempt to simplify how DNS scavenging works.
Windows 2000's DNS service supports the scavenging feature, which helps you ensure that DNS records managed by the service are up to date. Scavenging is particularly important if you use Dynamic DNS to automatically register client host names when their IP addresses change, as is often the case when the clients receive address assignments through DHCP.
Scavenging is set in three places on a Windows Server:
- On the individual resource record to be scavenged.
- On a zone to be scavenged.
- At one or more servers performing scavenging.
Enabling DNS Scavenging on Zones
The first thing we need to do is enable Scavenging. This is done separately for each DNS zone. To enable scavenging on all zones see “Enable Scavenging on All Zones” below. To enable scavenging right click the DNS zone, select properties and then on the general tab select the “ageing” button.
Tick the box “Scavenge Stale resource Records” and leave the rest to their defaults.
Here is where the confusion starts. The No-Refresh and Refresh Intervals are not when resource records get scavenged. They are timers for when DNS records become eligible for scavenging. The actual scavenging process is done elsewhere.
Enable Scavenging on All Zones
To enable scavenging for all zones right click the DNS server name and select “Set Ageing/Scavenging for all DNS zones”
It is important to point out that this will only enable scavenging on NEW zones. To apply it to existing zones tick the box (on next pop-up) that says “Apply these settings to the existing AD zones”.
DNS scavenging in Windows 2000
You can configure scavenging through a zone's properties.
- Open the DNS console, right-click the zone, and choose Properties.
- On the General tab, click Aging to open the Zone Aging/Scavenging Properties dialog box.
- Set the Refresh Interval and the No-refresh Interval using the drop-down lists.
- Select the Scavenge Stale Resource Records check box, and click OK to close both dialog boxes.
Thank you
Asraful islam.
Related Link of :
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