Refer to the exhibit. Routers R1, R2, R3, and R4 have been configured to run OSPF, and router R5 is running EIGRP. Traffic from R1 to R5 is expected to pass via R4, but OSPF routing has calculated the

The correct answer is D. Change the metric-type value on R3 to 2.. R3 and R4 are both ASBRs redistributing EIGRP (R5's routes) into OSPF. OSPF external route types matter here: E1 routes add the internal OSPF cost to the external metric, while E2 routes use only the external metric. Critically, OSPF always prefers E1 routes over E2 routes for th

Routing Policy and Manipulation

Question

Refer to the exhibit. Routers R1, R2, R3, and R4 have been configured to run OSPF, and router R5 is running EIGRP. Traffic from R1 to R5 is expected to pass via R4, but OSPF routing has calculated the best path R3. Which action corrects the problem?

Exhibit

Options

AConfigure R3 to use metric-type 1 with a higher metric than R4.
BConfigure R1 with a static route to the R5 networks and set R5 as the next hop.
CReconfigure R1 in Area 0.
DChange the metric-type value on R3 to 2.

How the community answered

(21 responses)

A
5% (1)
B
14% (3)
C
10% (2)
D
71% (15)

Explanation

R3 and R4 are both ASBRs redistributing EIGRP (R5's routes) into OSPF. OSPF external route types matter here: E1 routes add the internal OSPF cost to the external metric, while E2 routes use only the external metric. Critically, OSPF always prefers E1 routes over E2 routes for the same destination. If R3 is advertising R5's routes as E1 and R4 as E2, R1 will always prefer R3's path regardless of internal cost. Changing R3 to metric-type 2 (E2) makes both ASBRs advertise E2 routes, shifting selection back to the lowest external metric and then the shortest internal path to the ASBR-allowing the intended path via R4 to be chosen.

Topics

#OSPF Redistribution#OSPF Metric Type#OSPF Path Preference#EIGRP to OSPF

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