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Understand the Concepts , Configuration and Verification in Policy Based Routing
Updated on Sep, 2026
IT and Software , Network and Security,
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PBR is the process of using a route map to specify an attribute other than the destination and then define the path out of the router based on those conditions.
With PBR, a network administrator can select policies according to specific parameters, such as:
Once parameters like these are established, the data packets get routed accordingly. This empowers you to increase the agility of the network.
Because you can define your routing strategy using the attributes of applications, you can execute specific traffic-management policies that control how packets get forwarded.
In this way, you can optimize how bandwidth gets used by your most important applications. PBR is considered to be an exception to the routing information base (RIB) and is looked at before examining the RIB. This allows for more routing options.
For example, within the route map used for PBR, you can match on an access control list (ACL) that then matches on source, destination, protocol type, and/or port numbers.
Once you have a positive match, you can then set the next hop device’s address and/or egress interface. You can also set QoS values at the same time, which enable you to ensure an application gets the resources it needs to function as well as you need it to.
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Arash Deljoo is a seasoned Cisco engineer with 15 years of expertise in network engineering, communications, and education, particularly in E-learning. He holds a Master's degree in power electrical engineering and has developed numerous training courses in both English and Persian. Over his career, Arash has taught more than 20,000 students through online and in-person courses, sharing his deep knowledge with a global audience.
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