Software apparatus for distributing and providing fault-tolerance to path-vector routing protocols

  • US 7,155,535 B2
  • Filed: 09/10/2004
  • Issued: 12/26/2006
  • Est. Priority Date: 09/15/2000
  • Status: Expired due to Fees
First Claim
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1. A fault-tolerant router, comprising:

  • a first instance of inter-network routing software resident on a first processor of the fault-tolerant router;

    a second instance of inter-network routing software resident on a second processor of the fault-tolerant router;

    an internal fabric through which the processors communicate; and

    ports through which the instances of inter-network routing software communicate with external routers;

    characterized in that each instance of inter-network routing software establishes a routing session with at least one external router, learns routes from the external routers, and determines a set of routes, including a best route, from the routes learned and the separate instances of software each maintain a routing session with each external router, providing fault-tolerance thereby.

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