What Is VPLS?
VPLS is a class of VPN or Virtual Private Network that connects multiple sites to form a single bridged domain. It is implemented using a MPLS or Multi-Protocol Label Switching Network. That makes it protocol-transparent so that all services, regardless of which location the are physically located at, appear to be on the larger LAN that serves all locations.
How MPLS Replaces Frame Relay Networks
Frame relay has been a popular private WAN networking service to link multiple locations. MPLS is the replacement service that offers more flexibility, higher bandwidth and lower costs.
Transparent LAN Service
VPLS is sometimes called Transparent LAN service. That’s because WAN communications moves from level 3 to level 2. Your connection to the network is via a managed edge switch that is provided by the network operator. The inherent broadcast nature of Ethernet is preserved, creating a “plug and play” environment as new services are added to the network and discovered by other members connected to the VPLS.
Cost Advantage of Converged Networks
By merging voice, data and video onto a single network, the cost and support levels needed to maintain separate computer data, telephone and video networks is reduced to a single network staff. WAN networks may also be managed by the provider, if desired.
MPLS Network Speeds
MPLS networks can run at any network speed and are being adopted by major carriers as the multipoint to multipoint technology of choice. For this reason, MPLS is fast replacing Frame Relay.