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

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QuestionQ227

Layer 3 Technologies

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Refer to the exhibit. An engineer configures router 10.1.100.10 for EIGRP autosummarization so that R1 is expected to receive the summary route 10.0.0.0/8. However, R1 receives the more-specific /24 routes.

Which action resolves this issue?

  • A Router R1 should configure ip summary address eigrp (AS number) 10.0.0.0 255.0.0.0 for the R1 Fast Ethernet 0/0 connected interface.
  • B Router R1 should configure ip route 10.0.0.0 255.0.0.0 null 0 for the routes that are received on R1.
  • C Router 10.1.100.10 should configure ip route 10.0.0.0 255.0.0.0 null 0 for the routes that are summarized toward R1.
  • D Router 10.1.100.10 should configure ip summary address eigrp (AS number) 10.0.0.0 255.0.0.0 for the R1 Fast Ethernet 0/0 connected interface.
Explanation

EIGRP manual summarization must be configured on the advertising router’s interface facing the receiving router. Applying ip summary-address eigrp on router 10.1.100.10’s Fast Ethernet 0/0 advertises 10.0.0.0/8 to R1 and suppresses the component /24 routes on that interface. Cisco documents this command as interface-level EIGRP address summarization.

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