Recommended setting for DNS Scavenging

Question

_{Wednesday, January 2, 2013 3:45 AM}

Hi,

I'm currently setting up DNS Scavenging on our infrastructure.

I read the article "Don't be afraid of DNS Scavenging. Just be patient" which explains DNS Scavenging in detail.

My question is what are the recommended settings for following?

- No-Refresh Interval

- Refresh Interval

- Enable automatic scavenging of stale records

Is it recommended to keep the default settings which is 7 days?

All replies (2)

_{Thursday, January 3, 2013 8:43 AM ✅Answered}

Hi MacOverMatter,

Also, please note, it is recommended to configure No-refresh Interval and Refresh Interval settings being less than the DHCP Lease Period.

For details, please refer to How DNS Scavenging and the DHCP Lease Duration Relate.

More information:

DHCP, Dynamic DNS Updates , Scavenging, static entries & timestamps, the DnsUpdateProxy Group, and DHCP Name Protection (Published by Ace Fekay, Thu, Aug 20 2009)

Understanding Aging and Scavenging

Hope this helps.

Jeremy Wu
TechNet Community Support

_{Wednesday, January 2, 2013 7:29 AM}

Hi,

It depends on your infrastructure and ideal value would be 7 days. If  you keep all of them as 7 days, a stale record would get deleted in 21 days.

Regards, Server Engineer - Server Support