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JN0-663 · Question #10

You have a strict-high queue configured. You notice that under bursty traffic conditions, there are tail drops on the strict-high queue. Which action would solve this problem?

The correct answer is D. Increase the buffer size of the strict-high queue. A queue with strict-high priority is assured unlimited transmission bandwidth but is not actually assigned a large delay buffer. Not configuring a transmit-rate or an explicit buffer-size on a strict- high priority queue only ensures that the queue gets assigned a default…

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Question

You have a strict-high queue configured. You notice that under bursty traffic conditions, there are tail drops on the strict-high queue. Which action would solve this problem?

Options

  • AAssign a policer on ingress to assign a low packet loss priority to the strict-high queue.
  • BDecrease the buffer size of the strict-high queue.
  • CAssign a policer on egress to assign a low packet loss priority to the strict-high queue.
  • DIncrease the buffer size of the strict-high queue.

How the community answered

(45 responses)
  • A
    7% (3)
  • B
    16% (7)
  • C
    2% (1)
  • D
    76% (34)

Explanation

A queue with strict-high priority is assured unlimited transmission bandwidth but is not actually assigned a large delay buffer. Not configuring a transmit-rate or an explicit buffer-size on a strict- high priority queue only ensures that the queue gets assigned a default minimum delay buffer, making it possible, under bursty conditions, to see tail-drops on strict-high priority queues. Assigning a small transmit-rate or an explicit temporal or percentage buffer-size to the queue ensures that the queue has a large enough buffer to hold bursts and protect against tail-drops. schedulers-for-priority-scheduling.html

Topics

#strict-high queue#tail drops#buffer size#queue management

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