If your cable Internet service provider is also your telephone service provider, your cable modem may have a battery back up. The following cable modem power cycle procedure accommodates that possibility. If your cable modem does not have a battery, follow steps 1, 3, and 5 below to power cycle your cable modem:
1. Unplug the cable modem
2. Disconnect the battery (located in the bottom of the modem here)
3. Wait about ten seconds
4. Re-connect the battery
5. Plug in the modem
This procedure should reset your cable modem so it will learn the MAC ID of the currently connected device (router or computer's Ethernet adapter).
If you are going to clone the MAC ID for your computer's Ethernet device (NIC card) in the router, set the router up to clone the computer's MAC ID before you power cycle the cable modem. To get the MAC ID for your computer's Ethernet device open a terminal window and su to root. At the command prompt execute
ifconfig will report the configuration for all configured devices. Since you are using a wired connection (to the router), the device we are interested in is named eth0
. The MAC ID is in the first line of output for eth0
and is labeled as:
Link encap:Ethernet HWaddr ??:??:??:??:??:??
Note: I have replaced the actual MAC ID with the ? character as a place holder. The MAC ID consists of six hexadecimal numbers (in the range 00 to ff) separated by the colon ( : ) character. This is the number your router should clone.
Please do not be offended if you already knew this information. If so, perhaps it will be of help to someone