JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing (2023) — Question 56

You are deploying an MC-LAG connection at the edge of your network to a new customer. This solution must ensure that traffic uses all available links when forwarding traffic between the two networks.
In this scenario, which two statements are correct? (Choose two.)

Answer options

• A. Transit traffic sent between the two PE devices will use the ICL interface.
• B. You must use active/active mode when defining the MC-LAG bundle.
• C. You must use active/standby mode when defining the MC-LAG bundle.
• D. Transit traffic sent between the two PE devices will use the bundle’s member interfaces.

Correct answer: A, B

Explanation

Option A is correct because the ICL interface is used for transit traffic between PE devices in an MC-LAG setup. Option B is also correct as active/active mode allows multiple links to be utilized simultaneously, which is essential for maximizing link utilization. Options C and D are incorrect; active/standby mode does not leverage all links, and while member interfaces are part of the bundle, they do not serve transit traffic directly in this scenario.