Routers can have any errors like every other machine. If you need to configure the settings or resolve any error. You should know the default Asus router IP address. It will help you log in to your router and change the settings. The initial setup also requires the default IP address. You do have the option of changing it later if you wish. The default IP address for Asus router is 192.168.0.1. You can find the address by clocking on the search button. It is also mentioned in the manual that arrives with the router.