MicroNuggets: Policy-Based Routing (PBR) Explained

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In this video, Keith Barker covers the introduction, configuration, and verification of policy based routing (PBR) on a Cisco router. This is all about having special types of routing for certain types of traffic. PBR gives you the ability to override the default behavior of the routing table.

Policy-based routing gives you the ability to direct traffic selectively based on its type. You can set rules that allow you to override the default behavior of the routing table, which is a critical capability for a number of performance and security reasons.

There are several crucial steps to enable this function:

• First, you’ll create an access control list (ACL) to define various types of traffic, breaking it down so you can set policies for any particular kind.
• Next, you’ll create a route map, which is essentially just a giant “if/then” statement that says if traffic matches this access control list and has an applicable policy, it gets special treatment.
• Finally, you’ll apply the route map to the ingress interface.



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