No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Introduction to GRE

Introduction to GRE

This section describes the definition and benefits of GRE.


Generic Routing Encapsulation (GRE) is a protocol that encapsulates packets of some network layer protocols, such as Internetwork Packet Exchange (IPX), IPv6, and AppleTalk. Then the encapsulated packets can be transmitted over a different network layer protocol, such as IPv4.

As Layer 3 tunneling technology, GRE encapsulates packets of a protocol into packets of another protocol to transparently transmit packets over GRE tunnels. This technology enables packet transmission on heterogeneous networks.


  • GRE is easy to implement and increases only a few loads on devices at both ends of a tunnel.

  • GRE sets up tunnels over an IPv4 network to connect networks running different protocols, using the original network structure and reducing costs.

  • GRE enlarges the operation scope of network protocols that support limited hop counts, allowing for flexible topologies on enterprise networks.

Updated: 2019-08-09

Document ID: EDOC1000041694

Views: 58567

Downloads: 3621

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Previous Next