Need to perform D-Link dir 878 router setup for the first time, you can consider the steps given below.
Setting up the router from your computer:
Keep the modem and router on a flat surface.
You can place the router in an open area for better wireless coverage and to avoid interference.
Turn off the power on both devices and connect an Ethernet cable to the WAN port of the router and fix the other end to your modem for D-Link DIR-878 router setup.
Connect the power adapter to the router and fix the other end to the power outlet. Press the Power button on the D-Link router and wait for at least one minute. Now, wait until the LED light on the router changes from orange to solid white.
Plug in the modem to the power source and wait for at least one minute.
Now, switch on the modem.
If you are setting up the D-Link DIR-878 router wirelessly from your computer, go to Wi-Fi settings and select your Wi-Fi network from the displayed list. Enter the password of the network to get connected to the router.
To set up the D-Link DIR-878 router for the first time, connect your device to the router using a network cable. For a wired Ethernet connection, plug in the network cable to the LAN port of the router and plug in the other end of the cable to the Ethernet port on your computer.
You can connect the device to your Wi-Fi network or use the network cable to connect your device to the router.
Open a web browser and type the D-Link router's IP address in the address line, then tap the Enter key.
The IP address of the D-Link router is 192.168.0.1.
You can now type the login credentials of the router to go to the web-based setup page of the router.
The username of the router is Admin, leave the password field blank.
Once the D-Link DIR-878 router is set up, you can start connecting other devices to the router.
Setting up the router from your mobile device:
If you are setting up the D-Link DIR-878 router from your mobile device, download the D-Link QRS Mobile App from the Google Play Store for an Android device and the App Store application for an iOS device.
Open the application and tap on the Start button.
When you are in the operation mode, click on the Next button.
You can check the physical connection and proceed with the configuration process.
When the app detects the Internet settings, it will prompt you to configure the Wi-Fi settings.
You can enter an admin password for the router and make the required settings.
Touch the Save option and wait until the router restarts automatically.
You have now successfully done D-Link DIR-878 router setup from your mobile device.