IP conflict - how do I find it!!!

Hi all,

I have a test PC (Server 2003 Std.) that is telling me that its IP
(192.168.1.3 / 24) address has already been assigned on the network, and
then continuously tries to acquire an address. But I have gone and removed
all other devices from the switch and it still comes up with the same error.
I can change it to another IP (192.168.1.4) and it works, but when I change
it back I get the error. I have tried to ping the IP address while the PC
is using another address and it fails. I have flushed the DNS, checked both
LMHOSTS and HOSTS files, the arp cache and the nbtstat and I can't find
anything. What can I do to solve this. I don't know where else to look.
There can't possibly be another device using that address on the network
because it is the only device on the network. So it must be something
stored somewhere. Restarting doesn't help either.

TIA,

Jarryd

You may want to use ARP to find the other device Mac address. Or these cases may help,
System has detected IP conflict Event ID 4199 - "The system has detected a conflict for IP address" ... The system detected an address conflict for IP address 192.168.1.100 with the system ...
http://www.chicagotech.net/troublesh...ventid4199.htm


The system has detected a conflict for IP address Situation: the client reported some of their computers kept receiving: "The system has detected a conflict for IP address" error. ...
www.chicagotech.net/casestudy/ipconflict.htm



Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
"Jarryd" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
Hi all,

I have a test PC (Server 2003 Std.) that is telling me that its IP
(192.168.1.3 / 24) address has already been assigned on the network, and
then continuously tries to acquire an address. But I have gone and removed
all other devices from the switch and it still comes up with the same error.
I can change it to another IP (192.168.1.4) and it works, but when I change
it back I get the error. I have tried to ping the IP address while the PC
is using another address and it fails. I have flushed the DNS, checked both
LMHOSTS and HOSTS files, the arp cache and the nbtstat and I can't find
anything. What can I do to solve this. I don't know where else to look.
There can't possibly be another device using that address on the network
because it is the only device on the network. So it must be something
stored somewhere. Restarting doesn't help either.

TIA,

Jarryd

"Jarryd" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
> Hi all,
>
> I have a test PC (Server 2003 Std.) that is telling me that its IP
> (192.168.1.3 / 24) address has already been assigned on the network, and then
> continuously tries to acquire an address. But I have gone and removed all
> other devices from the switch and it still comes up with the same error. I can
> change it to another IP (192.168.1.4) and it works, but when I change it back
> I get the error. I have tried to ping the IP address while the PC is using
> another address and it fails. I have flushed the DNS, checked both LMHOSTS
> and HOSTS files, the arp cache and the nbtstat and I can't find anything.
> What can I do to solve this. I don't know where else to look. There can't
> possibly be another device using that address on the network because it is the
> only device on the network. So it must be something stored somewhere.
> Restarting doesn't help either.

I'd load WireShark and watch the packets to see what's happening.

> "Jarryd" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> I have a test PC (Server 2003 Std.) that is telling me that its IP
>> (192.168.1.3 / 24) address has already been assigned on the network, and
>> then continuously tries to acquire an address. But I have gone and
>> removed all other devices from the switch and it still comes up with the
>> same error. I can change it to another IP (192.168.1.4) and it works, but
>> when I change it back I get the error. I have tried to ping the IP
>> address while the PC is using another address and it fails. I have
>> flushed the DNS, checked both LMHOSTS and HOSTS files, the arp cache and
>> the nbtstat and I can't find anything.

What about WINS?

Another thing is if you change Nics in that machine without first deleting
the old Nic before you pull it out of the machine. The same may happen if
the machine has two nics with the other nic shut down if the other nic had
the IP# before it was shut down.

--
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com