From: GAURAV MADAN (gauravmadan1177@gmail.com)
Date: Tue Jul 15 2008 - 08:57:17 ART
HI All
Can someone Please clearify on Tc stuff as well .
Bc = Tc * CIR .. The example that Roger mentioned ; he has considered
the Tc as 125 msec .
Can someone please clearify under what conditions can we safely assume
this value ?
Thnx in advance
Gaurav Madan.
On Tue, Jul 15, 2008 at 4:19 PM, Roger RPF <rpf@bluemail.ch> wrote:
> Hi group,
>
> I need some confidence in FRTS with an example. I know it is a "hot
> discussed" topic and I catched a lot from all the discussions, but I'm still
> not 100% certain about "my calculation". Below a task which I tried to solve
> with FRTS and CB-Traffic shaping.
>
> The task is: Target transmission rate is 512Kbps but I'm allowed to burst up
> to port speed (1.5Mbps = AR = 1536000).
>
> So with FRTS I would do:
>
> map-class frame-relay shape
> frame-relay cir 512000 (target rate)
> frame-relay bc 64000 (CIR/Tc)
> frame-relay be 128000 (Ar/Tc - Bc)
>
> So the same stuff with Class Based shaping:
>
> policy-map shape
> class class-default
> shape peak 512000 64000 128000 (calculation is the same as with FRTS)
>
>
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