DHCP Messed up

[laic]

I was been assigned to take care of the AD, DNS, and DHCP of my company. However, the previous employee, did a horrible job, now I am here to clean up his mess.

Here is my problem, I found out that my DHCP is actually
giving out the same IP to two different computers. I tried
to trouble shoot it with my limited DHCP knowledge. I know
that there are two DHCP servers each with different IP range, and these two network are not connected. Even if it DID connect somewhere, it couldn't possible cause this problem, since the IP range is different. But that is not the case here.

Has anyone ever had this kind of problem before??

I really do need a help here.

Thanks

 

[NortonES2]

Never seen this before, are you sure that neither of the duplicate IP addresses is static?

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If it doesn't leak oil it must be empty!!

 

[GrnEyedLdy]

Laic,

In theory, this should not happen. Are you sure that the two DHCP servers you mentioned are configured with different scopes?

Check this link out to find out how to enable Conflict Detection using the Ping utility.

http://www.microsoft.com/technet/tr...ddocs/standard/sag_DHCP_pro_EnableAddress.asp

Here are some DHCP FAQ's that may help you troubleshoot this.

http://www.dhcp-handbook.com/dhcp_faq.html

Hope this helps,

Patty

 

[thebassplayer]

DHCP cannot give out the same address to two different systems. You must have a static or reserved lease on one of them.

Check the reservations section in the scope to ensure that addresses in there are not included in the scope.

 

[laic]

Thank, y'all for trying to help me out here.

I first discovered the problem, when our Norton Antivirus

server sent out a Virus found notification. I went to the

computer which the virus notification said, and found out

that there was no virus at all. So I did a ipconfig, and

found out that the computer name was different than the

original one that I setup to. There I began my DHCP trouble

shotting, and discovered A LOT of IPs are assigned to

two computers. Any suggest this might happen??

Laic