Multiplex communications – Diagnostic testing – Fault detection
Reexamination Certificate
2009-02-17
2011-11-15
Chou, Albert T (Department: 2471)
Multiplex communications
Diagnostic testing
Fault detection
C370S216000, C370S401000
Reexamination Certificate
active
08059549
ABSTRACT:
Methods and apparatuses are disclosed for interworking a first protocol, e.g., Provider Backbone Bridge Traffic Engineering (PBB-TE), that provides Ethernet carrier-class traffic engineering, with a second protocol, e.g., Virtual Private LAN Service, that emulates local area network (LAN) service. Unicast, multicast, and broadcast transmissions are enabled across an Ethernet aggregation network and an MPLS core network. Dual homing protection and end-to-end traffic engineering with adjustable granularity are also provided. These capabilities are not available with traditional PBB-TE networks or with an interworking between PBB and VPLS that has been previously proposed. Embodiments of the invention terminate a PBB-TE tunnel at a user-facing provider edge (UPE) node and attach instance service identifiers (ISIDs) to different virtual switching instances (VSI)s. As a result, inexpensive Ethernet-only aggregation networks can be designed to interoperate with VPLS with increased reliability and control, benefiting service providers and end users.
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Shah Chirayu A.
Soon Yee Ming
Chou Albert T
Hamilton Brook Smith & Reynolds P.C.
Tellabs Operations Inc.
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