Billion Electric Company BiGuard 50G - Manual (Page 186)

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Step 3: Go to Configuration > Dual WAN > General Settings. Select the Fail Over
radio button. Under Connectivity Decision, input the number of times BiGuard 50G
should probe the WAN before deciding that the ISP is in service or not (3 by default).
Next, input the duration of the probe cycle (30 sec. by default) and choose the way
WAN ports are probed.
Please ensure the WAN ports are functioning by performing a ping operation on each
before proceeding. Finally, choose whether or not BiGuard 50G should fail back to