1-5The Martini method applies to scenarios with sparse Layer 2 connections, such as a scenario with a startopology.Kompella MPLS L2VPNKompella MPLS L2VPN is different from Martini MPLS L2VPN in that it does not operate on theconnections between CEs directly. It organizes different VPNs in the whole service provider networkand encodes each CE in a VPN. For a connection to be established between two CEs, you only need toperform these tasks on the PEs:z Configuring CE IDs of the local and remote CEs respectivelyz Specifying the circuit ID that the local CE assigns to the connection, such as the VPI/VCI with ATM.Kompella MPLS L2VPN uses extended BGP as the signaling protocol to distribute VC labels. Its labelblock mode allows it to assign labels to multiple connections at a time.With Kompella MPLS L2VPN, you can specify the CE range of a VPN to indicate how many CEs can beconnected to the VPN. Then, the system assigns a label block of a size equal to the CE range for the CE.In this way, you can reserve some labels for the VPN for future use. This wastes some label resourcesin a short term, but can reduce the VPN deployment and configuration workload in the case ofexpansion.Imagine that an enterprise VPN contains 10 CEs and the number may increase to 20 in future serviceexpansion. In this case, you can set the CE range of each CE to 20. Thus, when you need to add a CEto the VPN later, you only need to modify the configurations of the PE to which the new CE is connected.No change is required for the other PEs. This makes VPN expansion extremely simple.Similar to MPLS L3VPN, Kompella MPLS L2VPN also uses VPN targets to identify VPNs. This bringsexcellent VPN networking flexibility.In addition, Kompella supports local connections.MPLS L2VPN Configuration Task ListComplete the following tasks to configure MPLS L2VPN:Task RemarksConfiguring MPLS L2VPN RequiredConfiguring a PE Interface Connecting a CE RequiredConfiguring CCC MPLS L2VPNConfiguring SVC MPLS L2VPNConfiguring Martini MPLS L2VPNConfiguring Kompella MPLS L2VPNRequiredUse one of the approaches according to theMPLS L2VPN implementation methodConfiguring an MPLS L2VPN Connection Basedon Layer 2 Ethernet Interface and VLAN Required
