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NE40E V800R010C00 Feature Description - VPN 01

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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).
Typical Networking

Typical Networking

A typical VPN has the following layers:

  • Access layer

    The devices on the access layer provide access services for users. These devices do not need to implement many functions, but must provide many access interfaces. For metropolitan area networks (MANs) in big cities, the access layer needs to provide more functions besides the access function.

    Generally, a CE is dual-homed or multi-homed to access nodes on the access layer. Dual homing can be either physical or logical. In physical dual homing, a CE accesses two nodes over two physical links; in logical dual homing, a CE accesses two nodes that reside on a ring.

  • Convergence layer

    The convergence layer has either a mesh topology or a ring topology.

  • Backbone layer

    The backbone layer must have a full-mesh topology and multi-level backup. The devices on the backbone layer are generally connected through high-speed interfaces.

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Updated: 2018-07-04

Document ID: EDOC1100027166

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