3com S7906E 설치 설명서

 

1-1 

 

The term “router” in this document refers to a router in a generic sense or a Layer 3 switch running 

routing protocols. 

 

Multi-CE (MCE) enables a switch to function as the CEs of multiple VPN instances in a BGP/MPLS VPN 

network, thus reducing the investment on network equipment.  

BGP/MPLS VPN is a kind of PE-based L3VPN technology for service provider VPN solutions. It uses 

BGP to advertise VPN routes and uses MPLS to forward VPN packets on the service provider 

backbone. 

BGP/MPLS VPN provides flexible networking modes, excellent scalability, and convenient support for 

MPLS QoS and MPLS TE. Hence, it is widely used. 

The BGP/MPLS VPN model consists of three kinds of devices: 

z 

Customer edge device (CE): A CE resides on a customer network and has one or more interfaces 

directly connected with service provider networks. It can be a router, a switch, or a host. It neither 

can "sense" the existence of any VPN nor needs to support MPLS. 

z 

Provider edge router (PE): A PE resides on a service provider network and connects one or more 

CEs to the network. On an MPLS network, all VPN processing occurs on the PEs. 

z 

Provider (P) router: A P router is a backbone router on a service provider network. It is not directly 

connected with any CE. It only needs to be equipped with basic MPLS forwarding capability. 

 illustrates a BGP/MPLS VPN implementation.