Changes

==Introduction==

==Introduction==

Generic Routing Encapsulation (GRE) is a tunneling protocol that can encapsulate a wide variety of network layer protocols inside virtual point-to-point links over an Internet Protocol network.

Generic Routing Encapsulation (GRE) is a tunneling protocol that can encapsulate a wide variety of network layer protocols inside virtual point-to-point links over an Internet Protocol network.

==Prerequisites==

==Prerequisites==

You will need:

You will need:

==Configuration scheme==

==Configuration scheme==

[[File:Networking_rutxxx_configuration_example_cli_cisco_gre_topology.png|border|class=tlt-border]]

[[File:Networking_rutxxx_configuration_example_cli_cisco_gre_topology.png|border|class=tlt-border]]

==RUT configuration==

==RUT configuration==

Connect to router's '''WebUI''', go to '''Services > VPN > GRE Tunnel'''. Enter a name for your GRE instance, click '''ADD''' and when instance appears in '''GRE Configuration''' field, click '''Edit'''.  

Connect to router's '''WebUI''', go to '''Services > VPN > GRE Tunnel'''. Enter a name for your GRE instance, click '''ADD''' and when instance appears in '''GRE Configuration''' field, click '''Edit'''.  

==Testing configuration==

==Testing configuration==

If all steps were followed correctly, tunnel interface should be active. But as with any other configuration, it is always wise to test the setup in order to make sure that it works properly. In order to test the GRE Tunnel connection, login to RUT WebUI and go to '''Services → CLI'''. Login with user name: '''root''' and the router's admin password. From there you should then be able to '''ping''' the opposite instance's virtual IP address. To use a ping command, type '''ping <Cisco_ip_address>''' and press the "Enter" key on your keyboard. You can also check it form Cisco routers side, connect to router with PuTTy or equivalent program and use same ping command '''ping <RUT_ip_address>'''.

If all steps were followed correctly, tunnel interface should be active. But as with any other configuration, it is always wise to test the setup in order to make sure that it works properly. In order to test the GRE Tunnel connection, login to RUT WebUI and go to '''Services → CLI'''. Login with user name: '''root''' and the router's admin password. From there you should then be able to '''ping''' the opposite instance's virtual IP address. To use a ping command, type '''ping <Cisco_ip_address>''' and press the "Enter" key on your keyboard. You can also check it form Cisco routers side, connect to router with PuTTy or equivalent program and use same ping command '''ping <RUT_ip_address>'''.

    

    

If ping requests are working, yours setup ready to use! If not please review the steps in this example once more.

If ping requests are working, yours setup ready to use! If not please review the steps in this example once more.