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Resolving virtual machine IP address conflict issues

Symptoms

Most Microsoft Windows versions report duplicate IP address via pop-up error messages: 
  • The system has detected a conflict for IP address
  • There is an IP address conflict with another system on the network
  • The static IP address that was just configured is already in use on the network. Please reconfigure a different IP address


Resolution

Resolving IP address conflicts

 
To resolve IP address conflicts:
  1. For network environments with statically assigned IP addresses, ensure each local host is configured with a unique IP address.

    If your computer has a dynamically assigned address, releasing and renewing its IP address can workaround IP address conflicts.

  2. Clear the ARP table of the LAN switch

  3. Assign a new IP address that has never been used if that option is available. First ping test the IP address before assigning it to confirm its availability.

Resolving TCP/IP stack issues on the virtual machine

To resolve TCP/IP stack issues on the virtual machine:

  1. Remove and reinstall your virtual network adapter driver.
  2. Verify, using the vSphere/ VI Client, that the ethernet adapter is connected and powered:

    1. Enable and disable the NIC and ping test.
    2. Uninstall VMware Tools and ping test.
    3. Connect to host using the vSphere/ VI Client.
    4. Turn off the virtual machine.
    5. Remove the ethernet adapter.
    6. Turn on the virtual machine. TCP/IP is not loaded.
    7. Turn off the virtual machine again.
    8. Add the ethernet adapter – at this point either auto assign a MAC or manually assign one.
    9. Assign a different IP address to eliminate the possibility of duplicate IP and do a ping test.
    10. Reinstall VMware Tools and do a ping test.

For related information, see Verifying virtual network adapter is present and connected to the virtual machine (1003786).

If there is a problems with assigning the IP address to the Virtual network adapter please see the following article Networking Error, IP Address Already Assigned to Another Adapter (1179).

Tags

cannot-connect-vm cannot-manage-vm connect-vm manage-vm

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