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How to track down Ip Conflicts

Hi,

Over the last few days weve had a few IP conflicts in our network and im trying tro track down where they are coming from.

ive followed microsofts recomendation here: http://support.microsoft.com/kb/164903

But im just getting Host not found and no ARP entries Found when i follow the guide.

Could someone please help me out in finding the root to this issue?

Cheers


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Reubenwelsh
Asked:
Reubenwelsh
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4 Solutions
 
ReubenwelshAuthor Commented:
These are the enentlogs we are gettin on our windows servers spread out over the network:

The system detected an address conflict for IP address 10.192.2.15 with the system having network hardware address 00-50-56-BF-61-AE. Network operations on this system may be disrupted as a result.
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DonConsolioCommented:
Did you clone a VMware virtual machine and forget to change the MAC address on one copy ?
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Christopher Raymond MendozaCommented:
Hello Reubenwelsh,

A few questions first:
Do you use DHCP?
Are all your computers running windows?
How many computers are there?
Are there appliances that needs to be assigned an IP address?
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ReubenwelshAuthor Commented:
Hi,

These are not Vmware machines. I get this eventlog every now and then (so far on ~6 servers) covering serveral subnets.

The servers having the issues are windows, this is for a giant organization where im not aware of everything going on. There could very well be a few Unix servers but based on our Unix group being ~1% of the company i doubt there are many.

There are, but not on the server net.
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ReubenwelshAuthor Commented:
Applicances that is...

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Christopher Raymond MendozaCommented:
We have DHCP and DNS servers in our networks. When trying to find computers we use:

    host [ip]
    nslookup [ip]

The latter can be used in windows too.
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ReubenwelshAuthor Commented:
But if you have an ip conflict it will go for the server that usualy has that IP. not the one causing the issue
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Christopher Raymond MendozaCommented:
Happened to one of my clients three weeks ago. They had to turn of the server just to isolate the other machine.
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ReubenwelshAuthor Commented:
Thanks for the effort.
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ReubenwelshAuthor Commented:
Oh, my last comment didnt come, The problems seems to have stopped and im moving on to another project. Shutting down the server is seldom an option in a production environment, but thanks for the help.
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