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

By Cisco · Question Mode

QuestionQ385

Layer 3 Technologies

Question Image

Refer to the exhibit. R1 and R2 are configured for EIGRP peering with authentication, but the neighbors do not come up. Which action resolves the issue?

  • A Configure a matching lowest key-id on both routers.
  • B Configure a matching authentication type on both routers.
  • C Configure a matching key-id number on both routers.
  • D Configure a matching key-chain name on both routers.
Explanation

EIGRP MD5 authentication uses the lowest-numbered valid key in a configured key chain. R1 has only key 2, whereas R2 has keys 1 and 2, so the routers select different active keys even though the authentication type and key-chain name match. Configuring the same lowest key ID on both routers makes the active authentication key consistent.

Learn more

Community Discussion

No comments yet. Be the first to start the discussion!