Internet Routing Architectures, Second Edition

Redundancy, Symmetry, and Load Balancing

The examples in this section illustrate the implementation of different route redundancy, symmetry, and load-balancing scenarios. Please remember that these scenarios are not cast in stone. Many variations of these techniques can be used to fit your situation. The examples presented here should guide you to a better understanding of how policies are set. We will first go over a brief implementation of default routes.

Dynamically Learned Defaults

It is important to control defaults in BGP because, if they are originated randomly, they could cause serious problems. Problems occur when a BGP speaker that intends to originate a default to a specific peer floods the default to all its neighbors. Cisco provides ...