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Routing TCP/IP, Volume I (CCIE Professional Development) by Jeff Doyle

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Routing Protocol Basics

All dynamic routing protocols are built around an algorithm. Generally, an algorithm is a step-by-step procedure for solving a problem. A routing algorithm must, at a minimum, specify the following:

  • A procedure for passing reachability information about networks to other routers.

  • A procedure for receiving reachability information from other routers

  • A procedure for determining optimal routes based on the reachability information it has and for recording this information in a route table

  • A procedure for reacting to, compensating for, and advertising topology changes in an internetwork

A few issues common to any routing protocol are path determination, metrics, convergence, and load balancing.

Path Determination

All networks ...

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