Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a DC that controls DNS and DHCP.

DHCP is set to limit the lease for 5 hours and has dynamic updates according to: Always dynamically update DNS A and PTR records, Discard A and PTR records when lease is deleted.

DHCP is also set to update DNS and PTR records for DHCP clients that do not request updates.

BOOTP clients are also limited to 5 hour leases.

DNS is set to scavenge stale resources records. 5 Hours for the no-refresh interval Refresh interval is set to 5 Hours as well.

Why do I still have DNS records with a timestamp from September.. Am I missing something?

share|improve this question
up vote 3 down vote accepted

Are the scavenging settings set on the zone, or did you do the "all zones" setting on the server? Is the box at the top of that dialog checked to actually enable the scavenging?

zone setting

Is the "Enable automatic scavenging" box checked in the "Advanced" tab of the DNS server's properties?

server setting

share|improve this answer
I got 4 minutes before I can accept your answer, I missed the enable automatic scavenging of stale records under the advanced tab. thank you!. – Jeff Nov 18 '11 at 18:14

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.