Digi TX54 User Manual page 368

Virtual Private Networks (VPN)
3. Add the GRE endpoint tunnel. For example, to add a tunnel named gre_example:
(config)> add vpn iptunnel gre_example
(config vpn iptunnel gre_example)>
GRE tunnels are enabled by default. To disable:
(config vpn iptunnel gre_example)> enable false
(config vpn iptunnel gre_example)>
4. Set the local endpoint to the GRE endpoint interface created in
(config vpn iptunnel gre_example)> local /network/interface/gre_endpoint
(config vpn iptunnel gre_example)>
To view configured interfaces and proper syntax:
(config vpn iptunnel gre_example)> local ?
Local endpoint: The local network interface to connect to peer device.
Format:
/network/interface/aview
/network/interface/defaultip
/network/interface/defaultlinklocal
/network/interface/gre_endpoint
/network/interface/lan1
/network/interface/loopback
/network/interface/wan1
/network/interface/wwan1
/network/interface/wwan2
Current value:
(config vpn iptunnel gre_example)>
5. Set the IP address of the GRE endpoint on the remote peer:
(config vpn iptunnel gre_example)> remote ip_address
(config vpn iptunnel gre_example)>
6. (Optional) Set a key that will be inserted in GRE packets created by this tunnel.
The key must match the key set by the remote endpoint.
(config vpn iptunnel gre_example)> key value
(config vpn iptunnel gre_example)>
where value is an interger between 0 and 4294967295, or an IP address.
7. (Optional) Enable the device to reply to Cisco GRE keepalive packets:
(config vpn iptunnel gre_example)> keepalive true
(config vpn iptunnel gre_example)>
TX54 User Guide
Generic Routing Encapsulation (GRE)
Task One, for example:
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