Re: FRTS Question - IEWB Lab8 Task7.1

The question seems not very clear.
It should say for how long you can burst upto AR (access rate).
Be is a measure of bits that is not related to Tc, so it is NOT a speed.

There are heaps of confusion about this, IMHO.
-Carlos

sp-ie m @ 15/4/2010 10:33 -0300 dixit:
> 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
>
>
>
>
>
>
>

-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net