300-410 ENARSI: Implementing Cisco Enterprise Advanced Routing and ServicesDemo

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QuestionQ119

Layer 3 Technologies

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Refer to the exhibit. Routers R1 and R2 have formed a network adjacency using EIGRP, and each router is advertising subnets to its neighbor. After running the show ip EIGRP topology all-links command on R1, some prefixes do not show R2 as a successor. Which action resolves the issue?

  • A Configure the network statement on the neighbor.
  • B Rectify the incorrect router ID in R2.
  • C Resolve the incorrect metric on the link.
  • D Enable split-horizon.
Explanation

Duplicate EIGRP router IDs can cause a router to discard received routes as self-originated, leaving the affected prefixes out of the topology table or without the neighbor as successor. Configuring a unique, correct EIGRP router ID on R2 allows R1 to accept R2’s advertised routes. Cisco documents that routes received with the local EIGRP router ID are discarded.

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