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System detected a conflict for IP address

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      rev.research
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      Event ID 4199 – “The system has detected a conflict for IP address”

      Symptom:

      1. You just turn on you computer, and receive an error message similar to one of the following messages:

      The system has detected a conflict for IP address with the system having hardware address .

      The system detected an address conflict for IP address with the system having hardware address . The local interface is being disabled.

      2. In the Event Viewer, you may see the Event ID 4199 –

      Description:

      The system detected an address conflict for IP address 192.168.1.100 with the system having network hardware address 00:0C:41:9B:88:89.

      Cause: There is another networking computer or device on the network using the same IP address.

      Resolutions:

      You may want to renew the computer IP by using ipconfig /release and renew command.

      You may assign a static IP.

      To find out the other device that is using the same IP, you may have three options.

      1. Check the records of DNS or WINS.
      2. Disconnect your computer from the network, and then using ping ?a command to find another computer host name.
      3. You can use ARP ?a command to find the Mac address of other device.

      You can get a clue about the offender by checking the System Log within the Windows Event Viewer (which you can get to via Start|Control Panel| Administrative Tools|Event Viewer) and looking for a DHCP error entry. The entry will list a network address (actually a MAC address) which you can use to identify the conflicting device

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