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Author Topic: PC makes IP conflict on our network  (Read 1924 times)
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« on: October 02, 2014, 01:12:56 pm »

Hornsj° - DRH Norway
Windows 2003 std.

The PC named: "Promo-PC" (Mac 00:0C:43:44:2B:0A) makes an IP conflict with server.
See below.
Probably the PC stops working OK on the network, or the server gets problems.

Event Type:   Error
Event Source:   Tcpip
Event Category:   None
Event ID:   4199
Date:      01/10/2014
Time:      14:49:47
User:      N/A
The system detected an address conflict for IP address with the system having network hardware address 00:0C:43:44:2B:0A. Network operations on this system may be disrupted as a result.

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« Reply #1 on: October 02, 2014, 01:26:27 pm »

Can it be this scenario?:
As we need to find out where the Promo-PC gets the IP from:
Sometimes the PC are connected to the ICE network, via ICE-router i Promotion Office?
And then switched back to the schools network (EnGenious).
For some reason the Promo-PC does not get a new IP lease immediately, as it should - it keeps the old one.

Try this:
Logon to the ICE-router┤s administrative console:
Write the IP number of the default gateway (the ICE router) in a browser.
When connected to the ICE router, open a Command Prompt.
Write the command: ipconfig (enter)
Here you can see the number of the default gateway.
You need the user/password for the ICE router.

Check out the scope of the DHCP leases the ICE-router gives out.
If it starts from the number:, change this to this scope: >

Save the changes.

When this is done, we are sure that this router in the future not leases out IP numbers which can be in conflict with er Schools server IP.

Check out the other routers you have on the school...


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