Eight-Class Model QoS for voice and video

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May 28th, 2008
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One of the QoS recomendation in the SRND "Enterprise QoS" is to create a Eight-Class QoS Model utilizing a seperate priority queue for voice and video.

It says that even though you have only one physical priority queue, that LLQ has an implicit policer that allows for time-division multiplexing of the single priority queue. This implicit policer abstract the fact that there is essentially a single LLQ within the algorithm and, thus, allows for the "provisioning" of multiple LLQs.

My question is if anyone has tried this and if there are any limitations on the platforms that can support this "dual-LLQ design."

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jsivulka Tue, 06/03/2008 - 11:05
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Design guide which is basically the QoSDesign recommendation bible.


It has a large section for WAN recommendations...while you may not

need to follow one of these Based on my understanding what what you

have for a link (DS3) and what you are trying to accomplish, I

believe the following section would be a good place to start.

- WAN Aggregator QoS Design

- WAN Edge Classification and Provisioning Models

- High Link Speed QoS Class Model

- Eight-Class Model


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