Re: QoS - srr-queue share and shape together

'shape' is defined in absolute terms, while 'share' is based on relative
weights. The bandwidth reserved is the inverse of the 'shape' value set.
 For instance, a setting of 2 would yield 1/2 of the interface bandwidth
reserved for that queue.

Also note that setting a 'shape' value for a queue will cause the 'shared'
setting to be ignored entirely.

I'm pretty sure your config is not doing what you think its doing.

Keller Giacomarro
keller.g_at_gmail.com

On Fri, May 3, 2013 at 3:38 PM, _ _ <krzysiek.zalewski_at_gmail.com> wrote:

> Hi. Please look below calculation, it is ok?
>
> interface FastEthernet0/20
> srr-queue bandwidth share 1 1 7 3
> srr-queue bandwidth shape 4 4 0 0
> mls qos trust dscp
>
> Q1 Q2 Q3 Q4
> shape 4 4 0 0
> share 1 1 7 3
> = 4 4 7 3
>
> Q1 = 4 -> 4/(4+4+7+3)=4/18 of full bandwidth(100Mb) = 22,22Mb ->
> 4/18*100Mb=22,22Mb
> Q2 = 4 -> 4/(4+4+7+3)=4/18 of full bandwidth(100Mb) = 22,22Mb ->
> 4/18*100Mb=22,22Mb
> Q3 = 7 -> 7/(4+4+7+3)=7/18 of full bandwidth(100Mb) = 38,88Mb ->
> 7/18*100Mb=38,88Mb
> Q4 = 3 -> 3/(4+4+7+3)=3/18 of full bandwidth(100Mb) = 16,66Mb ->
> 3/18*100Mb=16,66Mb
>
> =99,98Mb
> When Q3 and Q4 will have free bandwidth, can exchange it when they need.
> If Q4 is empty = 0 -> Q3 will have 38,88Mb+16,66Mb=55,54Mb
> If Q3 is empty = 0 -> Q4 will have 16,66Mb+38,88Mb=55,54Mb
> --
> Krzysiek
>
>
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Received on Fri May 03 2013 - 15:46:03 ART