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Arrangement in a router for distributing a routing rule used to generate routes based on a pattern of a received packet

  • US 20040223491A1
  • Filed: 05/06/2003
  • Published: 11/11/2004
  • Est. Priority Date: 05/06/2003
  • Status: Active Grant
First Claim
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1. A method in an Internet Protocol (IP) based router, the method comprising:

  • storing a routing rule that defines routes aggregated according to a prescribed topology, the routing rule specifying an address prefix pattern rule for extracting an identified pattern from a first portion of a destination address, and a gateway address pattern rule for generating a gateway address, specifying a gateway providing reachability to the destination address, based on applying the identified pattern to a specified second portion of the gateway address;

    generating a routing update message that describes the address prefix pattern rule and the gateway address pattern rule; and

    outputting the routing update message to a second router according to a prescribed routing protocol, for use by the second router in routing a corresponding received packet according to the prescribed topology.

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