Setting up a static IP on a fiber optic router involves assigning a fixed IP, subnet mask, and gateway to ensure consistent network access and connectivity.

Step 1: Connect and Access Your Router

Connect your router to the fiber modem (ONT) using an Ethernet cable. Open a web browser and enter your router's IP address (commonly 192.168.1.1 or 192.168.0.1) to access the admin panel. Log in with your credentials, which are usually provided by the manufacturer or ISP .

Step 2: Configure Static IP

Navigate to the network settings or LAN settings section. Disable DHCP if you want the router itself to use a static IP. Select the Static IP option and enter the following details:

• IP Address: The fixed IP assigned to your router or device.
• Subnet Mask: Typically 255.255.255.0 for small networks.
• Default Gateway: Usually the IP of your fiber modem or the main router . Save the changes and restart the router to apply the settings.

Step 3: Set Up Static Routing (Optional)

If you have multiple routers or need to access specific networks, configure static routes. On routers like TP-Link, go to Advanced > Network > Static Routing and add a route by specifying:

• Network Destination: The target network IP.
• Subnet Mask: The network's subnet.
• Default Gateway: The router or device that forwards traffic.
• Interface: LAN or WAN interface used for the route . Verify the route by accessing the destination IP from a connected device.

Step 4: Verify Connectivity

After configuration, check the IP assignment on your computer using ipconfig (Windows) or ifconfig (Linux/macOS). Ensure the router and connected devices maintain the static IP and can access the internet or internal network consistently .

Step 5: Advanced Considerations

For fiber services offering a static IP block (e.g., AT&T Fiber /28 block), you can assign multiple public IPs to devices like servers or firewalls. Understand the reserved addresses (network, broadcast, gateway) and assign the remaining usable IPs to your devices for direct internet access without NAT . This setup is ideal for hosting web servers, remote management, or public-facing applications. By following these steps, your fiber optic router will maintain a stable, static IP configuration, ensuring reliable connectivity for all networked devices.