What is the BGP/MPLS IP VPN? The features

When we use the Quidway S5700 S5700-28P-LI-AC, we should the basic knowledge for the BGP/MPLS IP VPN.
BGP/MPLS IP VPN is a L3VPN (Layer 3 Virtual Private Network). It uses BGP
(Border Gateway Protocol) released VPN routing in the backbone network service providers, the use of MPLS (Multiprotocol Label Switch) VPN messages transmitted in the service provider backbone network. Where IP refers to the VPN: the bearing is IP message.

The basic model of BGP/MPLS IP VPN as shown in figure.

The basic model of BGP/MPLS IP VPN consists of three parts: CE, PE and P.
1 CE (Customer Edge): user network edge device, the interface is directly connected with theservice provider network.
CE can be a switch or router, can also be a host. Typically, CE "perception" not to VPN
Existence, also does not need to support MPLS.
2 PE (Provider Edge): the service provider network edge device, is directly connected with the CE. In the MPLS network
In all, the processing of VPN occurs in PE, higher requirements on the performance of PE.
3 P (Provider): the backbone equipment service providers in the network, not directly connectedwith CE. P devices only need.
Preparation of basic MPLS forwarding capability, the VPN information is not maintained.
PE and P equipment only by the service provider of CE equipment management, only by the user management, unless the user management authority to a service
Provider.
A PE device may access multiple CE devices. A CE device can be connected to the same ordifferent service providers
Multiple PE devices.
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