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Policy Routing Using Linux® by Matthew G. Marsh

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IPv4 Dynamic Routing

Now that you have seen how to configure simple routing on both the Linux and Cisco platforms, consider how to automate some of the routing structure itself.

In most networks today, especially corporate and ISP internal networks, there are more than a few physical and logical networks. These networks also tend to change both through additions and deletions as well as simple reconfiguration. Tracking and updating all of the routers within such a network is painful enough when you consider just a handful of networks and routers, but it becomes an absolutely daunting task when the networks and routers exceed the fingers on one hand, especially when the network spans locations and topologies.

Another problem often seen in larger ...

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