Filter action: De-encapsulation: GRE

You can use this functionality to set up a filter to de-encapsulate any GRE packet that is received from a source with GRE encapsulation (tunnel-less GRE). For example, you can configure a filter for a specified source/destination IP address pair on an interface. GRE de-encapsulation would occur for a packet received that matches the filter. The filter result is used for further lookup and for forwarding path selection.