Symptom
Network services become unavailable to the computer you are setting up. You may see an alert box with a message that says (Figure 1):
Figure 1 Duplicate IP address message
Solution
In the Network pane of System Preferences, assign an IP address that is not in use. Consult your network administrator if you have questions about an appropriate IP address. If connectivity is not restored after saving your change in System Preferences, then either restart the computer or unplug and replug the Ethernet cable.
You can also resolve the IP address conflict by locating the other device using the affected IP address, then either reconfiguring it or disconnecting it from the network. After you do this, you may need to switch your computer to a different configuration, save it, then switch back to the original IP address in order for the changes to take effect.
Network services become unavailable to the computer you are setting up. You may see an alert box with a message that says (Figure 1):
- "IP Configuration <IP Address> is in use by <MAC Address>"
Figure 1 Duplicate IP address message
Solution
In the Network pane of System Preferences, assign an IP address that is not in use. Consult your network administrator if you have questions about an appropriate IP address. If connectivity is not restored after saving your change in System Preferences, then either restart the computer or unplug and replug the Ethernet cable.
You can also resolve the IP address conflict by locating the other device using the affected IP address, then either reconfiguring it or disconnecting it from the network. After you do this, you may need to switch your computer to a different configuration, save it, then switch back to the original IP address in order for the changes to take effect.