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

By Cisco · Question Mode

QuestionQ143

Layer 3 Technologies

Refer to the exhibit.

Question Image

The remote branch locations have a static neighbor relationship configured only to R1. R1 has successful neighbor relationships with the remote locations of R2 and R3, but the end users cannot communicate with one another.

Which configuration resolves the issue?

  • A
  • B
  • C
  • D
Explanation

EIGRP split horizon prevents R1 from advertising a route learned on FastEthernet0/0 back out FastEthernet0/0. Since both R2 and R3 connect through that same R1 interface, disabling EIGRP split horizon for AS 10 on R1 allows each branch to learn the other branch's routes. Cisco documents that EIGRP split horizon is enabled by default and can be disabled with no ip split-horizon eigrp as-number.

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