DNS Duplicate Entrys

Hello Experts,

I have a problem with DNS on my 2008R2 DC1 and DC2.

For some reason Im getting DNS entrys duplicating, and causing my pain.

Both DC's running 2008 R2. They both got there entries from the old DNS servers so automatically populated records when installed.

Thanks
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xObIAAsked:
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Dirk MareSystems Engineer (Acting IT Manager)Commented:
You need to configure to following.. DNS Aging and scavenging of stale DNS recods..

http://technet.microsoft.com/en-us/library/cc959277.aspx

http://technet.microsoft.com/en-us/library/cc770850.aspx
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xObIAAuthor Commented:
Do I need to set this on both servers DC1 and DC2 or just on PDC.

Thanks
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Dirk MareSystems Engineer (Acting IT Manager)Commented:
You can set it up on both..
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footechCommented:
This is a good reference for getting scavenging set up.
http://blogs.technet.com/b/networking/archive/2008/03/19/don-t-be-afraid-of-dns-scavenging-just-be-patient.aspx
Typically I would follow the advice in the article and just enable scavenging on one server so that if anything goes wrong you only have to look in one place.  However, it won't harm anything to have it set on multiple servers if you so choose.
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xObIAAuthor Commented:
]Ive have looked at scavenging, that exact guide to be exact. My DHCP has duplicate entries too. It feels as is if DC1 and DC2 are not working together properly. Also, since yesterday, i Have new random reverse lookup zones inplace. .. .

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Thanks Guys!
dn.PNG
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footechCommented:
What do you mean duplicate entries in DHCP?  Just with the same name?  A single computer with multiple interfaces (e.g. ethernet and WiFi) can have multiple leases.

You only have one DHCP server right?
Are your DNS zones AD integrated?  If you suspect replication problems, run dcdiag /v and dcdiag /v /test:dns on both servers and check the results.
The 0, 127, 255.in-addr.arpa reverse zones show if you have enabled advanced view.
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xObIAAuthor Commented:
Hi, Ran DCDIAG on the DC's and both test cam back the same and cant see anything bad. Have set up scanvenging on DC1 and to be honest This problem is no longer happening.

Will leave this open for a couple more days, and then dish the points!

All you help is appreciated! Thanks Experts!
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xObIAAuthor Commented:
Thanks Guys (and Girls if you be ) :)
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Windows Server 2008

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