ZyXEL Communications ZyWALL 110 Handbook & Instructions page 112

2 To test whether or not VPN failover is working, unplug wan1 of USG1.
Then ping from a PC in LAN1 of USG1 to a PC in LAN1 of USG2 and
vice versa.
Check the VPN status of the USG1 in the MONITOR > VPN Monitor >
IPSec screen.
PC of USG1 (192.168.1.34) > Window 7 > cmd > ping 192.168.11.33
Check the VPN status of the USG2 in the MONITOR > VPN Monitor >
IPSec screen.
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