Billion Electric Company 800VGT - Manual (Page 96)

Billion 800VGT Router
Example: Configuring L2TP LAN-to-LAN VPN Connection
The branch office establishes a L2TP VPN tunnel with head office, connecting the two private networks
over the Internet. The routers are installed in both the head office and branch office.
Both LAN networks MUST be on different subnets when using the LAN to LAN
application.
Attention
The settings of Pre-shared Key, VPN Connection Type and Security Algorithm
MUST BE identically set on both routers.
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Chapter 4: Configuration