Billion BiGuard 50G User Manual page 198

Step 2: Go to Configuration > Dual WAN > General Settings and enable Load
Balance mode. You may then decide whether to enable Service Detection or not.
Step 3: Go to Configuration > Dual WAN > Outbound Load Balance. Choose
your load balance policy and click Apply to apply your changes. If you selected
Based on session mechanism as your policy, the source IP address and destination
IP address may go through WAN1 or WAN2 depending on policy settings. If you
selected Based on IP hash mechanism as your policy, the source IP address and
destination IP address will go through a specific WAN port according to the IP hash
algorithm.
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