JN0-664: Service Provider Routing and Switching, ProfessionalDemo

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QuestionQ2

BGP

Click the Exhibit button.

Question Image

You are troubleshooting the connection between AS 64496 and AS 64497 and notice that only one path is being used for traffic forwarding.

Referring to the exhibit, which three actions will ensure that R1 is properly configured for BGP-route load balancing?

Choose three
  • A Verify that the routing table on R1 has BGP routes for 203.0.113.128/25 with multiple next hops.
  • B Verify that the multipath option is configured under protocols bgp on both R2 and R3.
  • C Verify that there is a load balancing export policy under routing-options for the received BGP routes on R1.
  • D Verify that the multipath option is configured under protocols bgp on R1.
  • E Verify that an import load balancing policy exists under protocols bgp for the received BGP routes on R1.
Explanation

BGP multipath on R1 allows equal BGP paths learned through R2 and R3 to be retained as multiple next hops. The route for 203.0.113.128/25 must consequently show multiple next hops. A load-balancing policy must also be exported from the routing table to the forwarding table under routing-options so traffic can be distributed across those next hops.

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