Mac OS X Yosemite, Mac OS X Mavericks and Mac OS X Mountain Lion Type ipconfig/release in the Command Prompt window.Press Windows and R key at the same time to open the Run box.Under Windows System, click on Command Prompt.
Navigate to the right and find the Windows System heading. Or, click on the down arrow icon at the bottom of the screen. Click Start and type CMD in the search box. Windows 7, Windows 8 and Windows 10 Windows 7 You might have to manually release and renew your IP address. Your connected device isn’t working right. Learn more about configuring connection settings for Xfinity Internet in Windows. You'll need to get DHCP setup instructions for your router from the manufacturer. You connected with a device not configured for the server. You used an old device for the first time in a while, and the server thinks it’s a new connection. You connected a new device, or a device with a new network card, for the first time. Then, you might need to manually release and renew your IP address before you can go online. Sometimes the DCHP lease won’t auto renew. A short-term DHCP lease is a temporary IP address that expires after a set amount of time.Ī device that’s set up correctly will auto renew the DHCP lease. 
Yours won’t change often, but sometimes, due to system maintenance, you'll get a short-term DHCP lease. This IP provides a unique identifier for each device on a local network to help transfer data to the correct place.Ī Dynamic Host Configuration Protocol (DHCP) server - a type of network server - assigns IPs. You’ll get one when you connect to your cable modem. Release and Renew Your Internet Protocol Address – Xfinity Release and Renew Your Internet Protocol Addressĭid you ever wonder what an IP address is? An IP (Internet Protocol) address is a unique ID number given to everything connected to the internet.
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