Draytek Telnet Command 1.11 - Manual (Page 90)

Telnet Command Reference Guide V1.1 84
2.19.2 vpn 2ndsubnet
This command allows users to enable 2ndsubnet IP as VPN server ID.
vpn 2ndsubnet on
vpn 2ndsubnet off
Syntax Description
on/off It means to enable or disable second subnet.
Example
> vpn 2ndsubnet on
%Enable second subnet IP as VPN server IP!