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Duplicate Name exist on the network

Posted on 2013-06-21
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Last Modified: 2013-06-24
Hi guys!

I have an issue in my network!! I have around 10 windows 7 PCs and around 9 Windows Xp PCs..... since last week we have been getting on ONLY the XP machines (All of them) an error "Duplicate Name exist on the network" this happens every time any Windows XP machine is turn on or connected to our network. I have looked in the network to see if I find a duplicate machine but I didn't find anything!! I don't know what else it might be..... I have a Netgear firewall that is acting as a DHCP.... Do you think the firewall is the issue? Also, this is a network which is under a Domain network. What do yo think? do you have any other ideas on how to troubleshot this?



Thanks,
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Question by:hugonieto
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by:paulmacd
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It seems likely there is a rogue DHCP server on the network, but it could be a WINS issue.  Do you run WINS?
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by:hugonieto
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Thanks Paulmacd.... Im sorry but how would I find out if Im running WINS? You mean in the server or in the Windows Xp clients?





Thanks,
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by:paulmacd
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It's a service - like DNS or DHCP - that is set up by a network administrator.  It's not used much any more, but that doesn't mean it isn't in use on your network.

Have you tried rebooting your Netgear firewall?  That might be worth a try as well.
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by:hugonieto
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What I just noticed too is that in the server under the Reverse Lookup Zones I have duplicate PTR records! For example 5 of them have different IP addresses but all 5 have the same host name.... this doesn't look normal does it? do you think this has something to do with the issue?




Thanks,
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by:hugonieto
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Paulmacd,


Then I'm not running WINS.... I have not setup something like that here.... I did tried I few reboots on the firewall and I think It does stop for some hours but then it keeps coming back the problem....
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paulmacd earned 500 total points
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Yes, you can flush any duplicate records from DNS - both on the forward and reverse look up side - and see if that helps.  

You'll need to reboot the computer(s) or run ipconfig /renew to re-register the computer(s) in DNS.
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by:hugonieto
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Thanks for the solution Paulmacd!!
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