Network Virtualization using Generic Routing Encapsulation

Network Virtualization using Generic Routing Encapsulation (NVGRE) is a network virtualization technology that attempts to alleviate the scalability problems associated with large cloud computing deployments. It uses Generic Routing Encapsulation (GRE) to tunnel layer 2 packets over layer 3 networks.^[1] Its principal backer is Microsoft.^[2]

• Virtual Extensible LAN (VXLAN), a similar competing specification
• Generic Networking Virtualization Encapsulation (GENEVE), an industry effort to unify both VXLAN and NVGRE technologies
• Generic Routing Encapsulation, GRE for transporting L3 packets.

• NVGRE Overview, November 19, 2012, by Joe Onisick

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