Network Troubleshooting - Release and renew IP address
Action
To release and renew your Internet Protocol (IP) address, follow the instructions below.
Instructions
Windows
Release IP Address
From the Start menu, select Run...
In the "Open:" field, enter cmd
Enter: ipconfig /release
Renew IP Address
From the Start menu, select Run...
In the "Open:" field, enter cmd
Enter: ipconfig /renew
Mac OS X
Release/Renew IP Address
Click on the Network Control Panel from within System Preferences.
Click the "Renew My DHCP Lease" button.
Your computer will release and renew its IP address immediately.