Unidentified Network issue – Comcast modem Harris TM502G


Scenario: Comcast modem conected directly to one computer via a RJ45 cable;
You add a 2nd computer to your network

When changing the network cable from one computer to another you lose the Internet connection on the 2nd cimputer or never get it connected to the Internet

Reason:
This is an issue with Comcast ARRIS modems model TM502G; You need to reset the modem (turn it off and turn it back on) so the Comcast server will give a new ip address for the computer you just connected the cable to. What happens is that the first computer had an ip address associated with the MAC address of that computer; when you move the cable from computer A to computer B, the comcast server via its modem did not give computer B a new ip address therefore you will get “identifying network” followed by “unidentified network”
PERMANENT SOLUTION: Get a router and put it between the comcast modem and your computers!
The router will provide the DHCP service you need and you will never have the same problem again
The official word from Comcast tech support is that “sometimes you need to reset the modem” in order for the ip to be provided for the 2nd computer

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