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Exam 300-420 topic 1 question 332 discussion

Actual exam question from Cisco's 300-420
Question #: 332
Topic #: 1
[All 300-420 Questions]



Refer to the exhibit. A network architect is preparing a network design based on the EIGRR. Routers are connected using a cat6a cable type and the inter-router connection speed is limited to 10 Mbps due to distance. During the pilot phase, a DUAL-3-SIA error message is visible. Which action must the engineer take to create a stable design?

  • A. Configure STUB area on R4.
  • B. Enable poison reverse on R4.
  • C. Disable split horizon on R1.
  • D. Create a summary route on R2.
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Suggested Answer: C 🗳️
by friscowaverider at Feb. 14, 2025, 8:42 a.m.

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friscowaverider
2 months, 2 weeks ago
Selected Answer: D
Because the question highlights DUAL-3 SIA errors in a pilot phase (often caused by too large a query domain, slow link speeds, or both), creating a summary route on R2 is the best practice to stabilize the EIGRP network. This approach minimizes the number of queries traversing low-bandwidth links and helps avoid “Stuck in Active” conditions.
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