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H8922 3G/4G Router User Manual
Figure 6-1
Main link (wan) configuration
Figure 6-2
Backup link (modem) configuration
Application result
After all the parameters are configured, the default route of the router goes to the eth0 (WAN) interface of the
primary link. If the router can ping the IP address of 202.170.138.60, the router will always work on the primary
link. As shown in Figure 6-3, the backup link modem is always online. If the wired network (WAN port) fails to
ping 202.170.138.60 due to a fault, the router will switch the link to the modem after multiple failures, so that
the services of the lower computer can be performed normally, as shown in below.
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