Generic routing encapsulation

Generic routing encapsulation
Communication protocol
PurposeNetwork tunneling
DeveloperCisco Systems
Introduction1994
RFCs1701, 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.

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