Patent ID: 8477620

Claim:
A system to provide multiple private networks comprising: a public Metropolitan Ethernet Interface (MAN) consisting of a Provider Backbone Bridge (PBB) network configured to receive a plurality of customer network services each with a separate Service Instance Identifier (I-SID); a plurality of physically separate local area network (LAN) ports configured to communicate data to LAN ports; and a switching process between the PBB interface and the LAN ports; the switching process being configured to create bindings, wherein each binding binds an individual I-SID from the PBB interface to each of the respective LAN ports so as to communicate data packets between the PBB and the bound LAN ports, the data packets being assigned to an individual LAN port based on the I-SID data stream binding, wherein an Ethernet frame format of each data packet includes an Ethernet Media Access Control (MAC) address, wherein the bindings are created independent of the Ethernet frame format Backbone Source Address (B-SA), Backbone Destination Address, (B-DA) and Backbone VLAN Identifier (B-VID) and leave the Ethernet frame format unaltered, such that prior to encapsulation at the PBB interface of a data packet being transmitted from a specific LAN port to the PBB network via a specific binding and after de-encapsulation at the PBB interface of a data packet being transmitted from the packet switched network to the specific LAN port via the specific binding, the specific binding hides the MAC address of the Ethernet frame format of the data packet through that binding from other LAN ports; wherein the bindings between the PBB port and the LAN ports provide network security by hiding the MAC addresses such that a security breach using a duplicate MAC address on a LAN port does not affect operation of other LAN ports.