350-401 Question 409
Single answerA network engineer has configured EIGRP on a router with multiple paths to the same destination. The paths have different metrics, and the engineer wants to configure unequal-cost load balancing to distribute traffic proportionally across these paths. Which command must the engineer use to achieve this?
- A
variance
- B
maximum-paths
- C
ip load-sharing per-packet
- D
bandwidth-percent
Show answer and explanation
Correct answer: A
Explanation
EIGRP supports unequal-cost load balancing using the 'variance' command. By setting a variance value, the router includes paths with metrics less than or equal to the variance multiplied by the best path metric. This allows EIGRP to balance traffic across paths with different costs, provided they meet the criteria defined by the variance value.
- A. Correct.
The 'variance
' command is used in EIGRP to enable unequal-cost load balancing. It allows the router to include backup paths with metrics less than or equal to the primary path metric multiplied by the variance value. - B. Incorrect.
The 'maximum-paths
' command determines the maximum number of paths that can be used for load balancing. However, it does not enable unequal-cost load balancing. - C. Incorrect.
The 'ip load-sharing per-packet' command is used to configure per-packet load sharing but does not address unequal-cost load balancing specifically.
- D. Incorrect.
The 'bandwidth-percent
' command adjusts the percentage of bandwidth that can be used for EIGRP traffic but is unrelated to load balancing.