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Duplicate IP address in forward lookup zone

Posted on 2011-03-03
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Last Modified: 2012-05-11
Hi All,

I have windows 2008. In DNS under Forward Lookup Zone in folder mydomain.local i have same address assigned to different hosts.

Whats the easiest way to clean it up ?

Thanks  DNS
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Question by:aucklandnz
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rawinnlnx9 earned 167 total points
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Right click the row and select 'Delete'. If that doesn't work right click the node just above and select properties. In the tabs find the extra entries and then [Remove] one of the lines and click ok.
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by:rawinnlnx9
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By doesn't work I mean that 'delete' isn't an option in the context menu when you right-click. It's just an a record. So when you view the properties of the ZONE you should be able to remove it  in the proper tab.
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by:uescomp
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You should also set up stale record scavenging on your zone so that this is taken care of automatically in the future.

http://technet.microsoft.com/en-us/library/cc737208(WS.10).aspx

This article says Server 2003 but it should apply to Server 2008 as well.
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by:garrett_boarder
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I would check your DHCP settings as well to make sure this doesn't happen time after time..

Right click the DHCP server and go to the DNS tab.

 DHCP Screen
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by:aucklandnz
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Thanks for your replies.

Im not sure which records should be deleted .

Ps.I have applied changes do DNS and DHCP as suggested by @garrett_boarder and @uescomp
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by:Alan3285
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Just to note, there is nothing inherently 'wrong' with more than one hostname resolving to the same IP.

For example, on my network, I have both:

SBSServerName

and

ProxyServer

resolving to the same IP address.

I do this so that, if I ever want to, I can move the proxying from the SBS box to another machine, and it won't require any changes to client machines - all I would do it change the IP in DNS.

Alan.
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by:garrett_boarder
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I guess you could try deleting the ptr record first and then the a record.  I remember having to do that at one point I believe.
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