Network Virtualization using Generic Routing Encapsulation (NVGRE) is a
network virtualization technology that attempts to alleviate the
scalability
Scalability is the property of a system to handle a growing amount of work by adding resources to the system.
In an economic context, a scalable business model implies that a company can increase sales given increased resources. For example, a ...
problems associated with large
cloud computing
Cloud computing is the on-demand availability of computer system resources, especially data storage ( cloud storage) and computing power, without direct active management by the user. Large clouds often have functions distributed over m ...
deployments. It uses
Generic Routing Encapsulation (GRE) to tunnel
layer 2
The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. This layer is the protocol layer that transfers data between nodes on a network segment across the physical layer. The data link layer ...
packets over
layer 3 networks.
Its principal backer is
Microsoft
Microsoft Corporation is an American multinational corporation, multinational technology company, technology corporation producing Software, computer software, consumer electronics, personal computers, and related services headquartered at th ...
.
See also
*
Virtual Extensible LAN
Virtual Extensible LAN (VXLAN) is a network virtualization technology that attempts to address the scalability problems associated with large cloud computing deployments. It uses a VLAN-like encapsulation technique to encapsulate OSI layer 2 ...
(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.
References
External links
NVGRE Overview November 19, 2012, by Joe Onisick
Tunneling protocols
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