DNA: Testing 4G LTE Failover



This article explains how to test the 4G LTE failover feature on the Datto Networking Appliance (DNA). 


  • Datto Networking Appliance (DNA)


The Datto Networking Appliance has the ability to automatically fail over to a 4G LTE cellular network in the event of a WAN interruption. The DNA's Test Failover option allows you to simulate a network interruption to evaluate the device's performance in 4G LTE mode.

Testing cellular failover will temporarily shut down the DNA's WAN connections, interrupt existing network connections, and activate the device's cellular failover functionality. Note that your network will function in a degraded state while the failover test runs. Use caution when testing this feature in a production environment.

To access the LTE/4G Failover UI, log into the DNA web interface, and click Status, as shown in Figure 1.

Figure 1: Status

You will see the WAN Details card displayed on the right-hand side of the page. Click the Test Failover button in the LTE/4G Failover category to begin the test.

Figure 2: WAN Details card 

While the test runs, the DNA will display the banner shown in Figure 3. The test can take up to a minute to complete.

Figure 3: Failover mode warning banner 

The DNA will return to the WAN connection on its own after the test finishes.

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