1. Introduction
This document provides comprehensive instructions for the setup, operation, and maintenance of your Linksys EA6400 Smart Wi-Fi AC1600 Router. This router is designed to facilitate reliable and high-speed wireless connectivity for multiple devices within your home or small office environment.
The Linksys EA6400 router integrates advanced Wi-Fi technology to support various network demands, from basic browsing to high-definition video streaming and online gaming.
2. Product Overview
2.1. Key Features
- Built with the latest Draft 802.11ac technology for high-quality performance and range.
- Works seamlessly with all a/b/g/n devices.
- Double the network bandwidth to avoid interference and maximize throughput.
- Experience speeds approximately 3x faster than Wireless-N.
- Four 10/100/1000 ports to connect wired devices at speeds 10X faster than Fast Ethernet.
- High-powered signal amplifiers deliver ultimate range and performance.
- Simple installation, no CD required.
- Touch the Simple Tap card to an NFC-enabled device and easily connect it to your home network.
2.2. Physical Components

Figure 1: Top-down view of the Linksys EA6400 Smart Wi-Fi AC1600 Router. This image displays the sleek, black casing with the Linksys logo and model number prominently featured on the top surface.

Figure 2: Rear view of the Linksys EA6400 Router, showing the various ports and buttons. From left to right, these include a USB 3.0 port, WAN port (blue), four LAN ports (yellow), a USB 2.0 port, the power input, and the power on/off switch.
3. Setup
3.1. Connecting the Router
- Positioning: Place the router in a central location within your home or office for optimal Wi-Fi coverage. Avoid placing it near large metal objects, concrete walls, or other electronic devices that may cause interference.
- Connect to Modem: Connect one end of the provided Ethernet cable to the yellow Internet (WAN) port on the back of the Linksys EA6400 router. Connect the other end of the Ethernet cable to your modem's Ethernet port.
- Power Connection: Connect the power adapter to the router's power input port and then plug the adapter into a power outlet.
- Power On: Press the power on/off switch located next to the power input. The router's indicator lights will illuminate.
3.2. Initial Configuration
Wait for the router to fully boot up. This may take a few minutes. Once the power and internet indicator lights are stable, you can proceed with configuration. You can configure the router using a web browser on a computer connected to the router (either wirelessly or via an Ethernet cable to one of the LAN ports) or via the Linksys Smart Wi-Fi app.
For web browser setup, open a browser and navigate to http://router.local or 192.168.1.1. Follow the on-screen instructions to set up your Wi-Fi network name (SSID) and password.
4. Operating
4.1. Connecting Devices
- Wired Devices: Connect devices such as computers, gaming consoles, or smart TVs to the router's four yellow LAN ports using Ethernet cables.
- Wireless Devices: On your wireless device (smartphone, tablet, laptop), search for available Wi-Fi networks. Select your router's Wi-Fi network name (SSID) and enter the password you configured during setup.
- NFC (Simple Tap): For NFC-enabled devices, touch the Simple Tap card (if included) to your device to automatically connect to the network.
4.2. Network Features
- Dual-Band Wi-Fi: The EA6400 operates on both 2.4 GHz and 5 GHz bands, providing flexibility for different device needs and reducing interference.
- USB Ports: The router includes USB 2.0 and USB 3.0 ports for connecting external storage devices (e.g., USB hard drives) to share files across your network.
5. Maintenance
5.1. Firmware Updates
Regularly check for and install firmware updates to ensure optimal performance, security, and access to the latest features. Firmware updates can typically be performed through the Linksys Smart Wi-Fi app or the router's web-based interface.
5.2. Resetting the Router
If you encounter persistent issues, you may need to reset the router to its factory default settings. Locate the reset button (often a small pinhole) on the back of the router. Use a paperclip or similar pointed object to press and hold the reset button for about 10 seconds until the power light blinks. Release the button, and the router will restart with factory settings.
6. Troubleshooting
- No Internet Connection:
- Ensure your modem is working correctly and has an active internet connection.
- Check all cable connections between the modem and router.
- Restart both your modem and router.
- Slow Wi-Fi Speeds:
- Relocate the router to a more central position, away from obstructions and interference sources.
- Ensure your devices are connected to the appropriate Wi-Fi band (5 GHz for closer, faster connections; 2.4 GHz for longer range).
- Check for firmware updates.
- Cannot Connect to Wi-Fi:
- Verify that you are entering the correct Wi-Fi network name (SSID) and password.
- Ensure the router's Wi-Fi is enabled (check indicator lights).
- Try restarting the router and your device.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Linksys |
| Model Name | EA6400 |
| Wireless Type | 802.11ac |
| Frequency Band Class | Dual-Band |
| Connectivity Technology | Wired, Wireless |
| Item Weight | 1.1 pounds |
| Product Dimensions | 10.8 x 7.25 x 1.58 inches |
| Operating System Compatibility | Windows, Mac OS |
| Ethernet Ports | Four 10/100/1000 (Gigabit) ports |
| USB Ports | USB 2.0, USB 3.0 |
| Special Feature | WPS (Wi-Fi Protected Setup) |
8. Warranty and Support
For warranty information, technical support, or to access additional resources, please refer to the documentation included with your product or visit the official Linksys support website. Keep your purchase receipt for warranty claims.





