Which of the following parameters are used in a hierarchical scheduler-policy to specify the priority of the child scheduler/queue for allocating bandwidth beyond its committed rate? (Choose two)

Question

Options

• ACIR
• BCIR level
• CCIR weight
• DRate
• ELevel
• FWeight

• A
  2% (1)
• B
  7% (4)
• C
  8% (5)
• D
  2% (1)
• E
  82% (50)

Explanation

In hierarchical scheduler policies (common in Juniper QoS), Level (E) and Weight (F) are the two parameters that govern how excess bandwidth - bandwidth beyond the committed rate - is distributed among child schedulers and queues. level sets the priority tier at which a child competes for excess bandwidth (higher level = higher priority), while weight determines the proportional share of excess bandwidth among children at the same level.

Why the distractors are wrong:

• A (CIR) defines the guaranteed committed bandwidth rate itself - it's what you're distributing from, not a priority parameter.
• B (CIR level) and C (CIR weight) are not valid parameters in hierarchical scheduler policy configuration; they conflate the CIR concept with the excess-bandwidth priority parameters.
• D (Rate) specifies bandwidth limits or rates, not the priority/weight used for excess allocation.

Memory tip: Think of it as a two-stage competition for leftover bandwidth - first, Level picks who gets to go first (like VIP tiers), then Weight decides how much each gets among equals (like splitting a pot proportionally). CIR is already spoken for - Level and Weight only fight over what's left.

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