300-415 Question #287: Real Exam Question with Answer & Explanation

This question assesses the ability to configure network routing for path preference in a multi-circuit environment, ensuring a leased circuit is prioritized over a shared one while still utilizing both for traffic.

Policies

Question

Refer to the exhibit. Company ABC has a hub-and-spoke topology in place and currently is load balancing their data traffic at the hub site over MPLS and the public Internet. The leased circuit must be preferred over the shared circuit. Which configuration meets the requirement?

Explanation

Approach. To achieve the requirement of preferring the MPLS leased circuit over the public Internet while allowing both circuits for load balancing, the routing protocol configuration must be manipulated. This typically involves configuring the routing protocol to assign a more favorable routing attribute- such as a lower metric (e.g., OSPF cost, EIGRP bandwidth/delay) or a lower administrative distance- to routes learned via the MPLS circuit. This ensures that the router's routing table selects the MPLS path as the primary route for destinations when it is available, with the public Internet path serving as a backup or for specific, less critical traffic if Policy-Based Routing (PBR) is also implemented. The interactive component would likely involve adjusting interface or routing protocol-specific parameters in a simulated command-line interface or graphical configuration tool.

Concept tested. Route manipulation, path selection, administrative distance, routing metrics, and load balancing in a hub-and-spoke network topology.

Topics

#SD-WAN Policies#Path Preference#Application-Aware Routing#Hub-and-Spoke Topology

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