12
4.4 Router with built-in DSL Modem
When you have a Router with a built-in Modem, such as most ISP provided models - the setup
is very similar to how it is explained above, under ‘Modem and Cable Router’ except the Modem
here will be your ISP Router with built-in modem.
It is recommended to configure one device to act explicitly as a Modem and one as a Router.
This means you should turn off the Wireless networks and DHCP server on your existing Modem
router, effectively making it act as just a Modem.
In the example below, the IP address of the Cable Modem is ‘192.168.10.254’ - the other settings
can be worked out based on this IP address.
Firstly, enter this IP address in the Default Gateway field then copy it into the main DNS field. In
the backup DNS field enter ‘8.8.8.8’. Now enter an IP address for your Gateway in the same range
as the Modem/Router IP address. The subnet should be set to 255.255.255.0.
The value in the Up/Down field limits the speed if required - to leave it unlimited enter 1000 in
both.
Once you are happy with your settings, click save.
