Not able to get default Gateway IP address of Asus Router through Ethernet Cable connection.

1. You need to check the connection of router with the computer just check weather router is on  or not or check the ethernet connection.
2. You can try to reset the router by pressing and holding reset key for 30 seconds.
3. The last thing you can do is to reboot the router.

if you want to know the ip address of your asus router follow that step;

• first of all connect your any device directly to the router.
• then choose the run window (window key+R)
• you need to type in the run box ncpa.cpl
• then check the status of the connection with the right click
• last step, click on the details you can see the default ip address ip4 address that is your ip address

First of all, Restart your router and after that check if you are getting the default ip address
and if its not working, then you have to reset your router and then it will work.