Solved

DNS Server Question

Posted on 2008-10-01
4
223 Views
Last Modified: 2010-04-07
Hello,

I was looking in the DNS forward lookup zone under the .local domain I have multiple data/ip addresses assigned to the same name/computer account. With that being said I am having no issue I was just wondering is this something to be concerned about .
0
Comment
Question by:NicBurns
  • 2
4 Comments
 
LVL 6

Assisted Solution

by:DewFreak
DewFreak earned 50 total points
ID: 22614777
NicBurns,
 Depending on your network/server configuration this is normal and nothing to be concerned about.
0
 
LVL 70

Expert Comment

by:Chris Dent
ID: 22614843

If they're old records that are now out of date it could be that you need to look at enabling Aging and Scavenging on your zones.

That way, dynamic records that are no longer relevant will be stripped out, keeping everything neat and tidy.

But as DewFreak says, it does depend on your configuration. Are the records actually wrong?

Chris
0
 

Author Comment

by:NicBurns
ID: 22615131
Example:

computer1                           192.168.100.1
computer7                           192.168.100.1
computer12                         192.168.100.1


computer1 is the pc that has the address assigned to it but computer 7 and 12 are there again with different ip addresses as well
0
 
LVL 70

Accepted Solution

by:
Chris Dent earned 75 total points
ID: 22615204

Then you will indeed need Aging and Scavenging configured to keep it neat and tidy.

Aging is configured by opening the DNS Console, then the properties for your Forward Lookup Zone. Click the Aging button, tick the box at the top then we need to assign No-Refresh and Refresh intervals.

The intervals run one after the other (No-Refresh, then Refresh) and ideally we want the total time to match up with your DHCP Lease duration (as long as that's not too short).

For example, if your DHCP lease is 8 days, setting No-Refresh to 4 days and Refresh to 4 days would work very well.

You shouldn't ever set the Refresh Interval to anything less than 1 day (or 2 if you want a buffer) because clients only register records once every 24 hours (that includes the service records for an AD domain).

Once that part is done you just need to enable Scavenging. Open the properties for the DNS Server level, select Advanced. Tick the box to enable Scavenging, I recommend setting the period to 1 day. That means it will go in and clean up records that are too old once per day.

Finally, the cleanup will not occur right away. The DNS server gives itself and all the clients time to chat before it allows Scavenging to run. You can see this if you select View, Advanced then open the Aging properties on the zone again. It locks Scavenging out until a full Refresh interval has passed.

But... once that has passed it will get rid of all the records that are no longer relevant.

Chris
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Scenerio: You have a server running Server 2003 and have applied a retail pack of Terminal Server Licenses.  You want to change servers or your server has crashed and you need to reapply the Terminal Server Licenses. When you enter the 16-digit lic…
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
This Micro Tutorial hows how you can integrate  Mac OSX to a Windows Active Directory Domain. Apple has made it easy to allow users to bind their macs to a windows domain with relative ease. The following video show how to bind OSX Mavericks to …

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question