Billion Electric Co. Ltd. BIL-9800VNXPD ユーザーズマニュアル

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Dual WAN is specially designed to offer users Failover/Fallback or Load Balance feature.  

Auto Failover/Failback is to ensure an always-on internet connection. Users can set a WAN1 (main WAN) and 
WAN 2 (backup WAN), and when WAN1 fails, it will switch to WAN2, and when WAN1 restores, it will switch to 
WAN1 again.  

 

 

 
Select Failover to enable the failover/failback feature or Load Balance to make the router work in load balance 
mode. 
 

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Select “EWAN”, “SFP” or “3G/4G-LTE USB” for WAN1 (The main WAN). 

Select the “SFP” or “3G/4G-LTE USB” for WAN2 as backup port if you select “EWAN” as WAN1. 

Set how many times of probing failure to switch to backup port. 

Set the time duration for the Probe Cycle to determine when the router will switch to the backup 

connection (backup port) once the main connection (main port) fails. For example, when set to 30 seconds, the 
probe will be conducted every 30 seconds. 

 

1) The time set is for each probe cycle, but the decision to change to the backup port is determined by Probe 
Cycle 

multiplied by connection Decision amount (e.g. From the image above it will be 30 seconds multiplied 

by 3 consecutive fails, the router will determine failover to WAN2 (backup port)). 

2).The failback setting follow the same decision policy as the failover. For example, according to settings above