300-620 Question #193: Real Exam Question with Answer & Explanation

The correct answer is A: Enable Export Route Control Subnet.. Aggregate Export This option can be used only for 0.0.0.0/0 with “Export Route Control Subnet”. When both “Export Route Control Subnet” and “Aggregate Export” are enabled for 0.0.0.0/0, ACI creates an IP prefix-list with “0.0.0.0/0 le 32”, which matches any subnets. Thus, this op

Question

Refer to the exhibit. The 0.0.0.0/0 is configured as a default static route on L3Out-1. Which action should be taken for the 0.0.0.0/0 prefix to advertise out on L3Out-2 OSPF?

Exhibit

Options

AEnable Export Route Control Subnet.
BEnable Shared Security Import Subnet.
CEnable Shared Route Control Subnet.
DEnable Aggregate Export Subnet.

Explanation

Aggregate Export This option can be used only for 0.0.0.0/0 with “Export Route Control Subnet”. When both “Export Route Control Subnet” and “Aggregate Export” are enabled for 0.0.0.0/0, ACI creates an IP prefix-list with “0.0.0.0/0 le 32”, which matches any subnets. Thus, this option can be used when an L3Out needs to advertise (export) any routes to the outside.

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