How to Set Up an NBN 4G/5G Failover Connection to Keep Your Brisbane Business Online During Outages

Summary

This guide helps you troubleshoot and resolve: How to Set Up an NBN 4G/5G Failover Connection to Keep Your Brisbane Business Online During Outages. Follow the steps below to fix the issue.

Common Causes

Internet outages can halt business operations, disrupt customer communications, and impact productivity. For Brisbane businesses relying on the NBN, a mobile broadband failover provides a secondary connection that activates automatically when your primary service goes down. This guide explains how to set up 4G or 5G failover using a compatible router so your organisation stays online during NBN outages.

Before You Begin

To configure failover, you will need:

• A business-grade router with dual-WAN or failover capabilities
• An active 4G or 5G mobile broadband service with a data SIM
• Your primary NBN connection connected to the router's WAN port
• Administrator access to your router's web interface

Note: Not all consumer-grade routers support automatic failover. Check your router's documentation for "dual WAN," "WAN failover," or "backup WAN" features before starting.

Detailed Instructions

Step 1: Install the Mobile Broadband SIM

1. Power off your router.
2. Insert the 4G or 5G data SIM into the router's SIM slot, or connect a compatible USB modem to the router's USB port.
3. Power on the router and wait for it to fully boot.
4. Check the router's status page to confirm the mobile connection has detected a signal and received an IP address.

Step 2: Access Your Router's Administration Interface

1. Connect a computer to the router via Ethernet cable or Wi-Fi.
2. Open a web browser and enter your router's default gateway address (commonly 192.168.1.1 or 192.168.0.1).
3. Log in using your administrator credentials. If you have not changed these, check the sticker on your router for the default username and password.

Step 3: Configure WAN Failover

1. Navigate to the Network or WAN settings menu.
2. Locate the WAN Failover, Dual WAN, or Load Balancing section.
3. Set your NBN connection as WAN 1 or Primary WAN.
4. Set your 4G/5G connection as WAN 2, Secondary WAN, or Backup WAN.
5. Enable Failover Mode or Auto Failover.
6. Configure failover triggers, such as Link Down or Ping Failure to a reliable address like 8.8.8.8.
7. Set the Failback option if you want traffic to return to the NBN connection automatically once it is restored.
8. Click Save or Apply to commit the changes.

Warning: Avoid using your mobile failover for large backups, software updates, or video streaming unless you have a generous data allowance. Excess data usage on the backup connection can result in additional charges or speed throttling.

Step 4: Test the Failover Connection

1. With both connections active, confirm your devices are browsing through the primary NBN link.
2. Disconnect the NBN cable from the router's WAN port.
3. Wait 30 to 60 seconds for the router to detect the outage and switch to the 4G/5G connection.
4. Verify that internet access is restored on your devices.
5. Reconnect the NBN cable and confirm the router switches back to the primary connection (if failback is enabled).

Troubleshooting

Failover Does Not Activate During an Outage

• Ensure the 4G/5G SIM is correctly inserted and has an active data plan.
• Check that failover is enabled in the router's WAN settings.
• Verify that the primary WAN is set to Link Down detection rather than only Ping Failure, as some NBN outages may not drop the physical link immediately.
• Restart the router and re-test.

Slow Speeds on Failover Connection

• 4G/5G speeds vary by location and signal strength. Position the router near a window or use an external antenna if available.
• Check your mobile data usage to ensure you have not been shaped or throttled by your provider.
• Limit non-essential devices during failover to preserve bandwidth for critical business operations.

Devices Lose Internet When Switching Connections

• Some devices cache DNS settings and may not immediately switch to the backup connection. Restart the affected device or toggle Wi-Fi off and on.
• Ensure your router's DHCP server is active and handing out consistent DNS addresses.

If you are unable to establish a stable failover connection, you can Open a Ticket and our Brisbane support team will assist you.

For help connecting devices to your network, see our guide on How to connect to Wi-Fi.

Still Having Issues?