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The configuration set that accomplishes the goals of allowing communication between the external subnet and internal EPG1, as well as leaking L30ut traffic into VRF named “VF1”, is option D: Export Route Control Subnet Import Route Control Subnet Aggregate Shared Routes. This configuration ensures that routes are properly exported from one entity and imported into another while aggregating shared routes for efficient routing within the VRF “VF1”. It allows for controlled route leaking which is necessary for communication across different entities within a Cisco ACI environment. References := ( Implementing Cisco Application Centric Infrastructure Official Cert Guide )

To support an application that is sensitive to latency and jitter, it is crucial to ensure that the Quality of Service (QoS) levels within the ACI fabric and the Inter-Pod Network (IPN) QoS policies are aligned. This alignment will help in maintaining consistent handling of the DSCP values set by the application (AF31 and CS6) as the packets traverse across the two ACI pods. By aligning the QoS levels and policies, the application’s packets are less likely to experience delays or drops, thus preserving the required performance levels for the application’s optimal functionality.

PBR Node Tracking:

Purpose: It is used to monitor the health and availability of endpoints within an Endpoint Group (EPG).

Functionality: When configured, it allows for real-time health checks and traffic redirection based on endpoint status and network conditions.

Benefits: Ensures traffic is directed to healthy endpoints, maintaining application performance and availability.