7.2. Selecting a Routing Strategy
         
      • Four routing strategies
        • No routing
        • Static routes only
        • Mostly static routes, but clients listen for RIP updates
        • Dynamic routing
      • Some rules of thumb to choose a strategy
        • A stand-alone network requires no routing.
        • If there is only one way out of a network, hosts on that network should have a default route to the only gateway.
        • A gateway with a small number of networks on one side and a gateway to "the world" on the other side can have static routes pointing to the former and default route to the latter. However, dynamic routing is advisable if there is more than one routing choice on both sides.
        • Use gated to send RIP updates to particular gateways rather than using routed which broadcasts RIP updates everywhere.
        • Dynamic routing should be used at points where networks cross political or administrative boundaries.
        • On dynamically-routed networks that contain loops or redundant paths, use OSPF if possible.
        • Exterior gateway protocols must be compatible with neighbor autonomous systems.
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