Transcription of Configuring Route Maps and Policy-Based Routing
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Configuring Route Maps and Policy-Based Routing
C H A P T E R2 Configuring Route Maps and Policy-Based RoutingPerhaps one of the most colorful descriptions for Route maps is that Route maps are like duct tape for the network not necessarily because they can be used to fix or mend something broken, but because they can be applied to numerous situations to address many issues. At times, they may not be the most pretty solutions, but they will be very effective. After you learn to configure and use Route maps, you will soon see why some engineers refer to them as Route tape. In Policy-Based Routing (PBR), for instance, you may use a Route map when traffic has to follow a particular path through the internetwork. This path may differ from the path the Routing protocol wants to forward traffic on. PBR, along with Route maps, enables the network engineer to essentially override the Route table and influence which way traffic flows. You also can apply Route maps in a number of ways. The following list contains some of the more common and powerful applications of Route maps: Route filtering during redistribution between Routing protocols Route control and attribute modification on BGP neighbors Route metric modification or tagging during redistribution between Routing protocols Policy-Based Routing (PBR)After you have Route maps in your engineering tool kit, you will have one of the most powerful and versatile configuration options available on Cisco routers.
C H A P T E R 2 Configuring Route Maps and Policy-Based Routing Perhaps one of the most colorful descriptions for route maps is that route maps are like duct
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