ZyXEL Communications ZyWALL 110 Handbook & Instructions page 108

6 In the same screen, create a VTI for the VPN tunnel BO2. Be aware that the IP
address of this VTI must be in the same subnet as vti2 on USG1. In this example,
the IP address and subnet mask of vti2 on USG1 is 10.10.11.10 and
255.255.255.0 respectively. The IP address of vti2 on USG2 must be in the subnet
of 10.10.11.0/24. Enable the connectivity check. Enter the IP address of vti2,
which is configured on USG1.
CONFIGURATION > Network > Interface > VTI > Add
CONFIGURATION > Network > Interface > VTI > vti1 > Connectivity Check
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