3Com 3C13636 Configuration Manual page 869

Router 3000 ethernet family

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3Com Router 3000 Ethernet Family

Configuration Guide

In MPLS L3VPN area, Huawei Technologies proposed the solution of hierarchy of VPN

(HoVPN). In HoVPN, functions of PE are distributed to multiple devices. Acting as

different roles in a hierarchical architecture, the devices fulfill functions of a centralized

PE together.

It is required that the devices in the upper hierarchy possess higher routing and

forwarding performance, while those in the lower hierarchy with lower performance,

which is similar to the typical network model.

II. HoVPN Implementation

Basic architecture of HoVPN

Figure 3-4 Basic architecture of HoVPN

As shown in Figure 3-4, the device directly connected with users is called underlayer

PE or User-end PE, shortened as UPE. The device connected with UPE in the internal

network is called superstratum PE or Service Provider-end PE, shortened as SPE.

Multiple UPEs and SPEs compose the hierarchical PE, functioning together as a

traditional PE.

In the networking of HoVPN, functions of PE are implemented hierarchically. So the

solution is also called hiberarchy of VPN or HoPE.

The UPE and SPE play different roles:

MPLS Backbone

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Chapter 3 BGP/MPLS VPN Configuration

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3c13636-us - router 3036 3000 series