Re: FRTS Question - IEWB Lab8 Task7.1

Hi

The solution is correct, I think you are thinking about this the wrong way.
To calculate the Be that can burst to port speed you need to work out the
difference between the Bc of the AIR (Port Speed) = 2250000
and the Bc of the CIR (15000000) = 750000

Be = 2250000-750000= 1500000

In response to your second point as far as I can see it would not be a
problem but people more experienced than me
might be able to clarify.

On 15 April 2010 14:33, sp-ie m <sp.ccie.me_at_gmail.com> wrote:

> Hi Guys i have a question related to Traffic shaping -
>
> The task asks this -
> Configure Frame Relay Traffic Shaping
> - port speed of 45Mbps.
> - DLCI 101 has a provisioned rate of 15Mbps.
> - In the case that R6 has accumulated credit it should be allowed to
> burst up to its port speed.
> - Use an interval of 50ms.
> - Do not use the frame-relay traffic-shaping command to accomplish this.
>
> Solution as per the solution guide -
>
> policy-map FRTS
> class class-default
> shape average 15000000 750000 1500000
> !
> interface Serial0/0/0
> bandwidth 45000
> frame-relay interface-dlci 101
> service-policy output FRTS
>
>
> My question -
>
> question1) shoudn't the excess burst be calculated based on port speed
> of 45Mbps with Tc=50ms which gives Be=2250000 (45000000*50/1000)
> So instead of Be=1500000 which is equates to a burst speed of 30Mbps,
> Be should be 2250000 which yields 45Mbps.
>
> question2) What if instead of using class-default, a class with "match
> fr-dlci 101" be used and applied globally on the interface? this way -
>
> class CLASS_DLC101
> match fr-dlci 101
>
> policy-map FRTS
> class CLASS_DLC101
> shape average 15000000 750000 2250000
> !
> interface Serial0/0/0
> bandwidth 45000
> service-policy output FRTS
>
> Any thoughts ?
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Thu Apr 15 2010 - 14:59:22 ART