VPLS Protocol Overview

JunosE Software enables you to configure one or more instances of VPLS, referred to as VPLS instances, on the router. VPLS employs an Ethernet-based layer 2 VPN to connect multiple individual LANs across a service provider’s MPLS core network. The geographically dispersed multiple LANs function as a single virtual LAN. VPLS provides a point-to-multipoint capability for traffic forwarding. In contrast, L2VPNs that enable a virtual private wire service (VPWS) provide only a point-to-point traffic forwarding capability.

VPLS preserves the broadcast and multicast capabilities of the physical LANs. Consequently, any broadcast or multicast traffic from a given customer end station is sent to all sites that participate in the VPLS instance.

You can use either BGP or LDP to provide signaling for VPLS, as follows:

Figure 130 illustrates an example of a simple VPLS topology. The basic topology of a VPLS network is the same regardless of whether BGP signaling or LDP signaling is used.

Figure 130: VPLS Sample Topology

VPLS Sample Topology

See Configuring BGP-MPLS Applications for information about configuring BGP/MPLS VPNs. See Configuring VPWS for information about configuring VPWS.

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