The Basic VPLS Configuration

The configuration for VPLS is simple. First, you must configure a VPLS instance with the global 12 vfi command. The VFI needs to have a unique name on the PE router. Then you need to specify a unique VPN ID number for that VFI. Configure as neighbors all the egress PE routers of the full mesh of that VPLS. Router(config-vfi) neighbor remote-router-id encapsulation mpls After you define the VFI, associate the VLAN interfaces belonging to that VFI with the VFI. You do this with the interface...

Peerto Peer VPN Model Versus Overlay VPN Model

A VPN is a network that emulates a private network over a common infrastructure. The private network requires all customer sites to be able to interconnect and be completely separate from other VPNs. The VPN usually belongs to one company and has several sites interconnected across the common service provider infrastructure. Service providers can deploy two major VPN models to provide VPN services to their customers In the overlay model, the service provider supplies a service of point-to-point...

Control Word Functions

The control word has the following five functions Carry control bits of the Layer 2 header of the transported protocol Preserve the sequence of the transported frames Facilitate the correct load balancing of AToM packets in the MPLS backbone network Facilitate fragmentation and reassembly Sometimes the transmitted labeled AToM packet is smaller than the required minimum length for the specific encapsulation type. An example is Ethernet, where the required minimum length of the frame is 64...