System and method for providing support for multipoint l2vpn services in devices without local bridging
AssigneeCisco Technology, Inc.
InventorsHarshavardhan Parandekar, Ali Sajassi, Sanjay Dhar
Life of this patent
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Abstract
A network device has a network interface to allow the device to send and receive traffic across a network. The device also has a cable connection to allow the device to exchange data with at least one cable modem and a processor to associate a cable interface and cable service identifier with a cable modem; receive a packet from the cable modem; and insert a layer 2 network identifier, the identifier comprising two service provider VLAN (SP-VLAN) tags, into the packet. The processor in the network device identifies a virtual trunk interface based on the outer SP-VLAN tag and identifies the virtual private network based on the inner SP-VLAN tag.
Claims1
A method comprising:
- receiving the 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, wherein the inner SP-VLAN tag represents a service flow on a destination node, wherein the outer SP-VLAN tag represents the destination node;
- and
- transmitting the double SP-VLAN tagged packet to an upstream network device.
Dependencies are inferred from the claim text.