Switched from DSL modem to Cable modem. Linksys

If you had your linksys router controlling the DSL connection, it was most likely a PPPoe connection requiring a username and password. Most cable companies have dynamic IP address and do not require a username or password.

Open your internet browser, IE, Firefox etc and go to 192.168.1.1 >
Enter your router username and password, typically admin and admin

In the setup tab, change your connection FROM whatever is listed there and make sure it is Autumatic DHCP Save your settings, and restart the router.

You should be fine.