D-Link DIR-825 - Manual (Page 21)

 D-Lnk DIR-825 User Manual
Secton  - Configuraton
If you selected Static, enter your network settings supplied by your Internet
provider. Click Next to continue.
Click Connect to save your settings.
Click Reboot.Now to reboot the router so the new settings can take effect.
Once the router is finished rebooting, click Continue. Please allow 1-2
minutes to connect.
Close your browser window and reopen it to test your Internet connection.
It may take a few tries to initially connect to the Internet.