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300-515 · Question #156

300-515 Question #156: Real Exam Question with Answer & Explanation

The correct answer is A. Set the route-target import value on PE1 to 104:104. E. Set the route-target import values on PE4 to 101:101. In an L3VPN, reachability between sites depends on route-target import/export alignment. PE1 exports 101:101, and PE4 exports 104:104. For the two sites to learn each other’s routes, PE1 must import 104:104 (PE4’s export) and PE4 must import 101:101 (PE1’s export). No export chan

Question

Refer to the exhibit. Company A has two sites, which are connected to PE1 and PE4 respectively. The route targets have been configured for the import and export values. PE1 and PE4 have established BGP connections for IPv4 and VPNv4, but the two customer A sites cannot communicate. Which two actions must the network engineer take to resolve the issue? (Choose two.)

Exhibit

300-515 question #156 exhibit

Options

  • ASet the route-target import value on PE1 to 104:104.
  • BSet the route-target export on PE1 to 101:101 and 104:104.
  • CSet the route-target import value on PE4 to 101:101 and 104:104.
  • DSet the route-target export value on PE4 to 101:101.
  • ESet the route-target import values on PE4 to 101:101

Explanation

In an L3VPN, reachability between sites depends on route-target import/export alignment. PE1 exports 101:101, and PE4 exports 104:104. For the two sites to learn each other’s routes, PE1 must import 104:104 (PE4’s export) and PE4 must import 101:101 (PE1’s export). No export changes are required.

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