Generic routing encapsulation
| Communication protocol | |
| Purpose | Network tunneling | 
|---|---|
| Developer(s) | Cisco Systems | 
| Introduction | 1994 | 
| 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.