300-510 SPRI: Implementing Cisco Service Provider Advanced Routing SolutionsDemo

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QuestionQ157

Unicast Routing

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Refer to the exhibit. Routers R1, R2, R3, and R4 are configured to run OSPF, and router R5 runs EIGRP. Traffic from R1 to R5 is expected to travel through R4, but OSPF has calculated the best path through R3. Which action resolves the issue?

  • A Reconfigure R1 in Area 0
  • B Configure R3 to use metric-type 1 with a higher metric than R4
  • C Configure R1 with a static route to the R5 networks and set R5 as the next hop
  • D Change the metric-type value on R3 to 2
Explanation

OSPF ranks external type 1 (E1) routes ahead of external type 2 (E2) routes. Because R3 redistributes the EIGRP route as E1 while R4 redistributes it as E2, R3 is selected regardless of the desired R4 path. Configuring R3 to advertise the route as type 2 makes both paths E2 so their external metrics and internal costs can determine the preferred route.

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