Generic routing encapsulation

Generic routing encapsulation
Communication protocol
PurposeNetwork tunneling
Developer(s)Cisco Systems
Introduction1994
RFC(s)1701, 1702, 2784

Generic routing encapsulation (GRE) is a tunneling protocol developed by Cisco Systems that can encapsulate a wide variety of network layer protocols inside virtual point-to-point links or point-to-multipoint links over an Internet Protocol network.