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DNS zone ageing / scavenging

Hi all, we have zone ageing / scavenging enabled on the DNS server 2008 R2. However there are a large number of duplications and old records which suggests its not working. It has been enabled since 2013 and is set for 7 days. Is there anything that can be checked?

thanks
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cwstad2
Asked:
cwstad2
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2 Solutions
 
gurutcCommented:
Can you post your zone settings for scavenging?  Do you have it set for both the zones and for the server?  For the zones only?  For the Server only?

- gurutc
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cwstad2Author Commented:
Hi it's for the zone only
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footechCommented:
If you haven't read this already, please do so.  It's one of the best guides for understanding DNS scavenging.  If you have read it, it's best to do it again.
http://blogs.technet.com/b/networking/archive/2008/03/19/don-t-be-afraid-of-dns-scavenging-just-be-patient.aspx

In order for a record to be scavenged:
- it needs to have a timestamp (and it can't have been refreshed for at least the no-refresh + refresh intervals)
- the zone containing it needs to be configured for scavenging
- the server needs to be set to scavenge records automatically
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cwstad2Author Commented:
Great article thank you
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