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Resiliency in minimum cost tree-based VPLS architecture

  • US 20070047556A1
  • Filed: 08/29/2005
  • Published: 03/01/2007
  • Est. Priority Date: 08/29/2005
  • Status: Active Grant
First Claim
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1. A method of providing broadcast services over a VPLS network having at least two source PE routers, each of which is connected to a respective head-end system for broadcasting services, and having a plurality of destination PE routers, each of which is connected to at least two core provider (P) routers in the VPLS network, the method comprising the steps:

  • a) calculating a plurality of Steiner trees, each such tree being sourced by a respective source PE router and including each destination PE router, the plurality of Steiner trees being disjoint from one another with respect to at least the core P routers in the VPLS network;

    b) provisioning each of the Steiner trees with enough bandwidth to carry all of the broadcast services; and

    c) broadcasting a portion of the broadcast services over each of the Steiner trees, whereby all of the broadcast services are broadcasted over the plurality of Steiner trees.

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