How does vpls work

A LAN is a generally small, privately owned network in a small geographic area that interconnects computerized devices within a company, providing high-speed access to users for the purposes of sharing information.

Ethernet can use either layer 2 or layer 3 services to create a networking solution providing high-bandwidth connectivity between locations within a metropolitan area, between two cities or across a WAN.

Ethernet can be implemented either as an access method to a layer 3 technology, or as a point-to-point, point-to-multi-point or anyto- any service.

As a point-to-point, layer 1 service, Ethernet can provide a dedicated connection within a metropolitan area, or as configured service channels on a Metropolitan SONET Ring. Generally speaking, multi-point and any-to-any services are switched Ethernet, which use switches to connect individual hosts or segments.

With traditional Ethernets, sometimes referred to as shared Ethernets, hosts compete for the same bandwidth. Switches allow dedicated roads to be created between individual users or small groups of users and their destination.

Individual ports are provided and each frame that arrives on a port has a Destination Address which tells the port where it needs to go. Switched Ethernets provide any-to-any high bandwidth support for LAN connectivity and are a convenient and effective way to extend the bandwidth of existing Ethernets see Figure 2. This service addresses transparent LAN needs. They map workstations on a method other than by geography, such as by department or application see Figure 3.

As a result of confinement of broadcast domains on a network, traffic on the network is significantly reduced. With this arrangement, workstations can be added and traffic can be managed easier than with a physical LAN, reducing administration costs. VLAN tags can be inserted into an Ethernet frame.

This is better suited for businesses that have devices in more than one location. Even if there are technically more than one LANs, it would still look like there was only one. A VPLS can help bring more security to your business while also allowing everyone to be on the same network, regardless of location. What Is It? They will not be able to auto-discover it, so it will need to be done manually.

It will still work; however, it just does not set up quite as cleanly as the BGP does. Artur Mkoyan. Views Total views. Actions Shares. No notes for slide. How to VPLS works 1. Classification of VPNs 4. Layer 2 VPNs 5. Layer 2 Encapsulation VPLS Concept And there is no conflict. This is the key point of VPLS architecture. VPLS Component It never learns the MAC addresses of the packets it receives on attachment circuits. VPLS Component again VPLS Flooding The difference is that, for VPLS, packets can traverse the service provider networks in point-to-multipoint fashion, meaning that a packet originating from a CE device can be broadcast to all the PE routers participating in a VPLS routing instance.

In contrast, a Layer 2 VPN forwards packets in point-to-point fashion. VPLS multihoming enables you to connect a customer site to multiple PE routers to provide redundant connectivity while preventing the formation of Layer 2 loops in the service provider network.

If the PE routers are connected to the same site and assigned the same VE device identifier, a loop-free topology is constructed using a routing mechanism such as BGP path selection.