This testvar must be explicitly defined in the configuration file
This parameter specifies the IP address of the PPP server created by CDRouter when L2TP is enabled. Note that L2TP creates a tunneled PPP connection once the L2TP control session is established. CDRouter will assign a new IP address to the L2TP client using this PPP session. Each end of the PPP connection must be configured using the L2TP server IP address and L2TP client IP address.