sentle blog: How to configure Verizon UML295 with Cradlepoint 1400 as an auto failover WAN connection using a Sonicwall

Request Public IP from Verizon if necessary. As of this writing, it is a one time charge of $500. Call Verizon customer service at 800-922-0204.

Plug Verizon USB device into Cradelpoint USB port 1.

Cradlepoint Settings:
Note: With Sonicwall, do not do IP passthrough.
    Navigate to System Settings->System Software
        In Firmware Upgrade click Check Again button. Apply any firmware update.
    Navigate to Internet->Connection Manager
        In WAN Interfaces section find USB device and verify Enabled is checked
        Verify State is connected
        Click Modem name
        Click Edit
    Navigate to Network Settings->WiFi / Local Networks
        Edit Primary LAN
            IP Settings tab
                Verify Enabled is checked
                Router Mode = NAT (default)
            DHCP tab
                DHCP Server = checked
            Click Submit

Sonicwall Settings:
Make sure to have latest Sonicwall firmware. As of this writing, it is SonicOS Enhanced 5.8.1.12-65o.
    Navigate to Network->Interfaces
    Select desired interface. For me it is X3
    Click Configure
        Zone = WAN
        IP Assignment = DHCP
        Host Name = CradlePoint
        Comment = CradlePoint Failover
        Click OK
    Navigate to Network->Failover & LB
        Check box for Enable Load Balancing
        Check box for Respond to Probes
        Configure Defalut LB Group
            On General tab, Add X3 to Selected Interface Ordering
            On Probing tab, uncheck Probe responder.global.sonicwall.com
            Click OK
        Configure X1
            Select Logical/Probe Monitoring enabled
            Choose Probe succeeds when both Main Target and Alternate Target respond
                Main Target = Ping, responder.global.sonicwall.com
                Alternate Target = Ping, 8.8.8.8
            Click OK
        Configure X3
            Select Logical/Probe Monitoring enabled
            Choose Probe succeeds when both Main Target and Alternate Target respond
                Main Target = Ping, responder.global.sonicwall.com
                Alternate Target = Ping, 8.8.8.8
            Click OK

To test from Sonicwall:
    Navigate to System->Diagnostics
        Dignostic Tools = Ping
        IP Address = 8.8.8.8
        Interface X3
        Verify Alive

        Dignostic Tools = TraceRoute
        IP Address = 8.8.8.8
        Interface X3
        Verify hops, route, and trace complete

To test from a computer
Create a new route with the test computers IP address.
    Navigate to Network->Routing and click Add button at bottom of screen
        Source = Create new address object. Give same name as test computer name.
        Destination = Any
        Service = Any
        Gateway = X3 Default Gateway
        Interface = X3
    Click OK
From test computer ping 8.8.8.8 and tracert 8.8.8.8. Verify reply and reachable.
Go to http://ipchicken.com/ and verify public IP