Route Selection Process

  1. The Longest Match Rule
    This form of routing is known as the destination-based routing. The process of comparing the destination IP with the prefixes int the routing table is done bit by bit
    if you have a tie then we go to the AD rules,
  2. Administrative Distance
    Will always choose The LOWER the value of AD as best route
    and if there is a tie again will go to the Metric Rules ,
  3. Metric
    The tie-breaker is going to be the LOWEST value of the METRIC
    if ever there is still a tie the router is going to perform load balancing (traffic sharing).

Routing selection always goes through this process.


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