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

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Refer to the exhibit. An engineer configures two ASBRs, 10.4.17.6 and 10.4.15.5, in an OSPF network to redistribute routes from EIGRP. However, both ASBRs display the EIGRP routes with equal costs, even though next-hop router 10.4.17.6 is closer to R1. How should network traffic to the EIGRP prefixes be sent through 10.4.17.6?

A The administrative distance should be raised to 120 from the ASBR 10.4.17.6.
B The redistributed prefixes should be advertised as Type 1.
C The ASBR 10.4.17.6 should assign a tag to match and assign a lower metric on R1.
D The administrative distance should be raised to 120 from the ASBR 10.4.15.5.

Explanation

OSPF Type 2 external routes compare only their external metric, so equal E2 metrics do not account for the internal OSPF cost to reach each ASBR. Type 1 external routes add the external metric to the internal OSPF cost to the ASBR; therefore, the route through the closer ASBR, 10.4.17.6, is preferred.

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Cisco IOS XE OSPF Configuration Guide — OSPF Limit on Number of Redistributed Routes

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

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