Re: FRTS: Tc and Bc (IEWB vol1 lab7 task 8.2)

From: ghias hassan (ghias.hassan@gmail.com)
Date: Thu Oct 12 2006 - 08:25:33 ART


Srdja,

this is something regarding to frame - relay policing not
shaping,,,which works inbound on FR switches.

regards,
Ghias.

On 10/12/06, srdja blagojevic <srdja1@pexim.co.yu> wrote:
> FR map for this task from solution guide is:
>
> !
> map-class frame-relay DLCI_504
> frame-relay cir 768000
> frame-relay bc 7680
> frame-relay fragment 960
>
>
> My solution was:
>
> map-class frame-relay DLCI_504
> frame-relay cir 768000
> frame-relay tc 10
> frame-relay fragment 960
>
>
> I thought that since CIR=Bc/Tc, these two solution are the same.
> Unfortunately, with sh traffic-shape, I found out that in the first case Tc
> is 10 ms and in the second case is 63 ms. What is the purpose of this
> command (frame-relay tc 10)if I can not set Tc with it?
>
> What am I missing here? Why these two configurations are not generating same
> show traffic-shape output?
>
> Any good link explaining this difference?
>
> TIA,
> Srdja
>
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