QoS conventions (queue and scheduler)

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May 18th, 2006
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i am a little confused about the queues and the Scheduler conventions ... for example; LLQ Queue, is it a queue or a scheduler that choose packets from queues.


Thanks in advance.

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mounir.mohamed Fri, 05/19/2006 - 08:31
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Dear me7me7,


LLQ is one of the Queuing tools or mechanisms and The Low Latency Queueing feature brings strict priority queueing to Class-Based Weighted Fair Queueing (CBWFQ). So it's Queuing tool not scheduler

The scheduler always serviced the highest-priority queue first. If there was always traffic in the high priority queue, the lower-priority queues were starved of bandwidth and packets going to non-priority queues.


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Yours, Mounir Mohamed

mounir.mohamed Fri, 05/19/2006 - 12:31
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Dear Mohamed,


I just wanna clarify more

LLQ is Queuing tool

-Queuing evaluates the packet/frame based on Cos or Tos..etc and determine in which queue the packet will be placed

-Scheduling service all the queues and distinguish between different queues based on its priority.


Best Regards,

Mounir Mohamed

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