How to Cycle an IP Address on a Comcast Modem

Comcast provides Internet services distributed over RF cables and accessible through a cable modem. The Comcast cable modem assigns an IP address to your account based on the Media Access Control address of the connected ethernet device, such as a computer or a router. You can cycle the IP address assigned to your Comcast account by temporarily changing the ethernet device connected to the Comcast cable modem.

Instructions

1. Disconnect the ethernet cable and remove the power from the Comcast cable modem.

2. Power on the modem and wait approximately two minutes for the signal to synchronize.

3. Connect a different device to the cable modem with an ethernet cable. For example, if a router or desktop computer is normally connected to the cable modem, connect a laptop to it instead. This forces the Comcast cable modem to cycle the IP address with a new one.

4. Disconnect the ethernet cable and remove the power from the cable modem.

5. Power on the cable modem and wait approximately two minutes for the signal to synchronize.

6. Connect the original device to the cable modem's ethernet port. This forces the cable modem to cycle the IP address again and a completely new IP address is configured for the modem.