Digi TX54 User Manual page 369

Virtual Private Networks (VPN)
8. Save the configuration and apply the change:
(config vpn iptunnel gre_example)> save
Configuration saved.
>
9. Type exit to exit the Admin CLI.
Depending on your device configuration, you may be presented with an Access selection
menu. Type quit to disconnect from the device.
TX54 User Guide
Generic Routing Encapsulation (GRE)
369