Question

An engineer runs OSPF with area 0 and area 1. R1 is the ABR between the two areas. Area 1 contains the contiguous subnets 10.1.0.0/24 through 10.1.3.0/24. The engineer configures 'area 1 range 10.1.0.0 255.255.252.0' under the OSPF process on R1 to advertise a single summary into area 0. After the change, routers in area 0 receive the summary route, but its metric is 30 even though the engineer expected the metric to reflect a specific component. On R1, the individual area 1 routes show costs of 10, 20, 25, and 30. Which statement correctly explains the metric of the summary LSA advertised into area 0?

Accepted Answer

The summary Type 3 LSA uses the highest metric among the component routes unless a cost is manually set on the area range command.

Answer

The summary Type 3 LSA uses the lowest metric among the component routes unless a cost is manually set on the area range command.

Answer

The summary Type 3 LSA always uses a fixed default cost of 20 regardless of the component route metrics.

Answer

The summary Type 3 LSA sums all component route metrics unless a cost is manually set on the area range command.