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System and method for providing support for multipoint L2VPN services in devices without local bridging

  • US 8,228,928 B2
  • Filed: 11/17/2009
  • Issued: 07/24/2012
  • Est. Priority Date: 01/19/2006
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving a packet from a cable modem;

    identifying a cable interface and cable service identifier associated with the cable modem;

    inserting a layer 2 (L2) network identifier into the packet, the L2 network identifier comprising inner and outer Service Provider Virtual Local Area Network (SP-VLAN) tags to be used within a service provider network to bridge the packet across the service provider network, wherein the inner SP-VLAN tag represents a customer VPN in a multipoint L2VPN service wherein the inner SP-VLAN tag is associated with a particular bridge group, wherein the outer SP-VLAN tag represents a single attachment circuit and wherein the outer SP-VLAN tag is associated with a virtual interface trunk;

    wherein the inner SP-VLAN tag and the outer SP-VLAN tag are added to the packet upon entry into the service provider network;

    andtransmitting the double SP-VLAN tagged packet to an upstream network device;

    wherein the inner SP-VLAN tag and the outer SP-VLAN tag are removed from the packet prior to exiting the service provider network.

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