With hierarchical scheduling, up to ___________ tiers are supported on the Alcatel-Lucent 7750 SR.

The correct answer is B. 3. On the Alcatel-Lucent 7750 SR, hierarchical scheduling supports exactly 3 tiers: the port scheduler, the aggregate scheduler, and the queue scheduler - making B (3) correct. Options A (8), C (4), D (5), and E (6) are plausible-sounding numbers but do not match Nokia's…

Scheduling

Question

Options

How the community answered

(18 responses)

A
6% (1)
B
89% (16)
D
6% (1)

Explanation

On the Alcatel-Lucent 7750 SR, hierarchical scheduling supports exactly 3 tiers: the port scheduler, the aggregate scheduler, and the queue scheduler - making B (3) correct. Options A (8), C (4), D (5), and E (6) are plausible-sounding numbers but do not match Nokia's documented 7750 SR QoS architecture for hierarchical scheduling tiers. The three tiers allow traffic to be shaped and prioritized at the queue level, then aggregated across services, and finally policed at the egress port level. Memory tip: Think "3 tiers = 3 letters in QoS" - or picture a 3-layer pyramid: queues at the bottom, aggregates in the middle, port at the top.

Topics

#hierarchical scheduling#scheduling tiers#7750 SR#multi-tier QoS

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