Re: QoS Shaping Question

From: Venkatesh Palani (kvpalani@gmail.com)
Date: Wed Feb 15 2006 - 23:28:12 GMT-3


Hi Jim,

Your config will shape to 96K within which you will have a priority for 32
K, having Prority + CBWFQ is called LLQ. Also please note all this will
come into effect only when there is a congestion.

Thank you,
Venkatesh

On 2/16/06, Balogh, Jim <jim.balogh@gwl.com> wrote:
>
> My formatting got messed up....this should look better:
>
> ________________________________
>
> From: Balogh, Jim
> Sent: Wednesday, February 15, 2006 10:34 AM
> To: 'ccielab@groupstudy.com'
> Subject: QoS Shaping Question
>
>
> Please see configuration below. I am trying to get a handle on the Shaping
> Queue, Interface Software Queue and TX ring. If I wanted to configure the
> Shaping Queue with one LLQ for VoIP, and remaining traffic to be moved
> into a
> WFQ, and then the Software Interface Queue as a WFQ, will my config look
> like
>
> policy-map VOIP
>
> class VOIP-RTP
>
> priority 32 _ configures a LLQ within the SHAPING
> QUEUE!!
>
> class class-default
>
> fair-queue _ configure WFQ within the SHAPING QUEUE!!
>
>
>
> policy-map SHAPE-ALL
>
> class class-default
>
> shape average 96000 960 _SHAPING Queue-shape to 96k with Tc=10ms
>
> service-policy VOIP _ apply VOIP policy to the SHAPING QUEUE
>
>
>
> interface serial0/0
>
> fair-queue _enable WFQ for the SOFTWARE QUEUE!!!!
>
>
>
> interface serial0/0.1
>
> service-policy output SHAPE-ALL _ enable CB Shaping
>
>
>
> From my understanding, if the transmission rate is above the Shaping rate,
> the
> packets will be moved into the Shaping Queue. Then the scheduler removes a
> packet from the Shaping Queue (either a WFQ or LLQ if a VoIP packet is
> waiting), and if the TX Ring is full the packet is moved to the Interface
> Software Queue. In this case the Software Queue is a WFQ.
>
>
>
> QUESTION - if I want the Shaping Queue to retain the same config, how can
> I
> configure the Software Queue as CBWFQ? Thx.
>
>
>
> Jim
>
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