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Feature Description - MPLS 01

NE05E and NE08E V300R003C10SPC500

This is NE05E and NE08E V300R003C10SPC500 Feature Description - MPLS
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MPLS-based VPN

MPLS-based VPN

A traditional virtual private network (VPN) transmits private network data over a public network using tunneling protocols, such as the Generic Routing Encapsulation (GRE), and Point to Point Tunneling Protocol (PPTP).

An MPLS-based VPN, which is as secure as Frame Relay networks, does not encapsulate or encrypt packets; therefore, IP Security (IPsec), GREtunnels do not need to be deployed. The MPLS-based VPN helps minimize the network delay time.

The MPLS-based VPN connect different branches of the private network through LSPs to form a unified network, as shown in Figure 1.The MPLS-based VPN also support interworking between different VPNs.

Figure 2-10 illustrates an MPLS-based VPN. The following devices are deployed on the MPLS-based VPN:

  • Customer edge (CE): an edge device on a customer network. The CE can be a router, switch, or host.

  • Provider edge (PE): an edge device on a service provider network.

  • Provider (P): is a backbone device in the service provider network and does not connect to CEs directly. A P device obtains basic MPLS forwarding capabilities but does not maintain VPN information.
Figure 2-10 MPLS-based VPN

The principles of an MPLS-based VPN are as follows:

  • PEs manage VPN users, establish LSPs between themselves, and advertise routes to VPN sites.

  • LDP or MP-BGP is used to allocate routes.

  • The MPLS-based VPN supports IP address multiplexing between sites and the interconnection of VPNs.

Updated: 2019-01-14

Document ID: EDOC1100058933

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