Alcatel-Lucent NRS II – IP/MPLS Services — Question 12

A profile-mode queue is configured with MBS = 100 KB, CBS = 50 KB and High-Priority-Only = 40%. Assume there is no CBS overbooking, and the slope-policy is disabled. If the current queue depth is 70 KB, what will happen to an out-of-profile packet when it is transmitted to the queue?

Answer options

• A. It will be stored in the reserved buffer space and remain out-of-profile.
• B. It will be stored in the reserved buffer space and become in-profile.
• C. It will contend for shared buffer space with packets from other queues.
• D. It will be discarded because the high-priority-only threshold has been reached.

Correct answer: A

Explanation

The correct answer is A because the out-of-profile packet can be accommodated in the reserved buffer space without exceeding the current queue depth. Options B and C are incorrect as the out-of-profile packet does not transition to in-profile status and does not compete for shared buffer space given the current configuration. Option D is also incorrect since the out-of-profile packet is not discarded under these circumstances.