Cisco Cisco IOS Software Release 12.4(2)T

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The OER Application-Aware Routing: PBR feature introduces the capability to optimize traffic based 
on portions of an IP packet, other than the destination address. Independent Optimized Edge Routing 
(OER) policy configuration is applied to only a subset of the traffic carried by the monitored prefix. You 
can use this feature to apply very granular OER policy configuration based on the type of application or 
IP packet, without changing OER policy configuration for other traffic that is carried by the monitored 
prefix. The master controller uses policy-based routing (PBR) to send the subset of traffic to the external 
interface that conforms to the independent policy configuration. 

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12.4(2)T This 

feature was introduced.