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300-515 · Question #174

300-515 Question #174: Real Exam Question with Answer & Explanation

The correct answer is B. Add the PE3 route-target export value as the route-target import value.. For two customer sites to communicate through an L3VPN, each PE must import the other PE’s exported route-target. PE3 is already exporting 301:301. To learn PE3’s customer routes, PE2 must import 301:301 into the customer VRF so the routes from CE3 become visible in PE2’s VRF and

Question

Refer to the exhibit. PE routers PE2 and PE3 are each connected to a CE at a branch office belonging to the same small company, which connects to the internet via the service provider's L3VPN. The company now requires connectivity between the two branch offices. A service provider engineer has already made the appropriate changes to PE3. Which action must the engineer take under the customer's VRF on PE2 to allow the two customer sites to communicate?

Exhibit

300-515 question #174 exhibit

Options

  • AAdd the PE3 route-target export value as the route-target export value.
  • BAdd the PE3 route-target export value as the route-target import value.
  • CAdd the PE2 route-target export value as the route-target export value.
  • DAdd the PE2 route-target export value as the route-distinguisher value.

Explanation

For two customer sites to communicate through an L3VPN, each PE must import the other PE’s exported route-target. PE3 is already exporting 301:301. To learn PE3’s customer routes, PE2 must import 301:301 into the customer VRF so the routes from CE3 become visible in PE2’s VRF and can be forwarded toward CE2.

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