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Changes to the Best Route to a Network

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Windows Server 2003: This API has been superseded by the Routing Table Manager Version 2 API and will not be available beyond Windows Server 2003. New applications should use the Routing Table Manager Version 2 API.

A change in any of the following values for the best route to a given destination network causes the routing table manager to generate a notification message sent to each registered client and to the forwarders:

  • Protocol identifier
  • Interface index
  • Address of next-hop router
  • Protocol family-specific data that includes route metrics

A change in protocol identifier, interface index, or next-hop router address occurs when a new, better-route entry is added, or when the current best-route entry is deleted or aged out, and leaves another route as the new best route.