300-410 Question 77
Single answerA network engineer is configuring EIGRP on a dual-homed topology where one link has a bandwidth of 100 Mbps and a delay of 10 microseconds, while the other link has a bandwidth of 10 Mbps and a delay of 100 microseconds. The engineer wants to influence EIGRP's path selection to prefer the higher bandwidth link but does not want to use manual route metrics. How can this be achieved?
- A
Adjust the K-values in EIGRP to prioritize bandwidth over delay.
- B
Manually modify the delay value on the lower bandwidth link to increase its metric.
- C
Use the variance command to load-balance across both links.
- D
Configure EIGRP to use only bandwidth as the sole metric for path selection.
Show answer and explanation
Correct answer: A
Explanation
EIGRP calculates its metric using a composite formula that considers bandwidth and delay by default. By adjusting the K-values, the engineer can influence the weighting of these components, allowing EIGRP to prioritize bandwidth over delay without manually configuring each link's metric.
- A. Correct.
Adjusting the K-values in EIGRP to prioritize bandwidth over delay will influence the composite metric calculation, allowing EIGRP to prefer the higher bandwidth link without manually modifying route metrics.
- B. Incorrect.
Manually modifying the delay value on the lower bandwidth link would influence the metric but does not align with the requirement to avoid manual metric adjustments.
- C. Incorrect.
The variance command allows for unequal-cost load balancing but does not directly influence which path EIGRP prefers as the primary route.
- D. Incorrect.
Configuring EIGRP to use only bandwidth as the sole metric is not possible, as EIGRP always calculates its metric using both bandwidth and delay (unless the K-values are specifically adjusted).