The Tunnel Concentrator is effectively the IPv4 address of the tunnel termination
point. Tunnel Concentrators are used with Generic Routing Encapsulation (GRE)
tunnels to offer direct point-to-point traffic flow without involving the
controller. The VPN Concentrator must first be configured as a device type in
ExtremeCloud IQ
Controller before it
can be used to define a GRE tunneled topology.
![Note](images/note.png)
Note
In future releases, the IPv4
address will be coupled with IPSEC security options.
Take the following steps to configure a Tunnel Concentrator: