Draytek Vigor2930 Series User Manual page 146

Profile Name
Enable this profile
VPN Connection
Through
Specify a name for the profile of the LAN-to-LAN
connection.
Check here to activate this profile.
Use the drop down menu to choose a proper WAN interface
for this profile. This setting is useful for dial-out only.
WAN1 First - While connecting, the router will use WAN1
as the first channel for VPN connection. If WAN1 fails, the
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Vigor2930 Series User's Guide