Re: Traffic shaping question

If they do not specify "burst" I would not configure it.

There are a couple differences between your two examples. One is frame
relay traffic shaping, the other is generic traffic shaping. Be careful
which one they ask for. Also your FRTS example will only shape for the one
DLCI the other one will shape for all DLCI's on that subinterface.

On Wed, Jun 6, 2012 at 8:10 AM, Ivan Hrvatska <ivanzghr_at_gmail.com> wrote:

> Anybody?
>
> On Mon, Jun 4, 2012 at 3:19 AM, Ivan Hrvatska <ivanzghr_at_gmail.com> wrote:
> > Hi,
> > this TS topic sometimes confuse me so I will ask you, experts, on one
> task:
> >
> > "The FR link speed should target a transmission rate of 512 kbps
> > although the service provider does allow bursting to port speed (1536
> > Mbps). BECNs shouldn't be processed."
> >
> > OK. Let say we have FR p2p between two routers. So let see if I get this:
> > Traffic is always send out of queue at interface speed (clock rate).
> > So in this task Tc is not mentioned and it should stay 125 ms? If
> > Tc=125ms, that means in each Tc interval serial interface can send max
> > 192 kbps for sending at full int speed. To achieve CIR=512 kbps, at
> > each Tc interval, interface should send Bc= 64 kbps, which means that
> > in takes around 42 msec to send Bc amount of traffic and we have
> > around 83 msec in every Tc which can be utilized by excess burst.
> > Right?
> > Now we come to excess burst. Since the task says "service provider
> > does allow bursting to port speed", does that mean that at each Tc
> > interval we can send Bc+Be, where Be=AIR/8 - Bc = 128 kbps?
> > Theoretically, we can burst non stop to interface speed in this task
> > and achieve speed of T1 here? What is correlation between this burst
> > in this task and the Be in tasks where there is only average shaping
> > put as task? If the task didn't mention "provider allows burst" should
> > I still need to configure Be? Not for the purpose of bursting till
> > interface speed, just for burst if there was periods of inactivity
> > with Bc over interval.
> > The term "excess bursting". Is it only used for bursts while there was
> > time of inactivity with Bc traffic so that the average speed over 1
> > sec at the end should not be more than CIR?
> >
> > I have two configuration solutions and could you tell me are those
> > solution doing same thing:
> >
> > 1) map-class frame-relay SHAPE
> > frame-relay cir 512000
> > frame-relay bc 64000
> > frame-relay be 128000
> > int s1/0.1
> > frame-relay interface-dlci 204
> > class SHAPE
> >
> > 2) policy-map SHAPE
> > class class-default
> > shape average 512000 64000 128000
> > int s1/0.1
> > service-policy output SHAPE
> >
> > In solution 1) frame-relay cir ? says:
> > R4(config-map-class)#frame-relay cir ?
> > <1-45000000> Applied to both Incoming/Outgoing CIR, Bits per second
> > in Incoming CIR
> > out Outgoing CIR
> >
> > If shaping is only egress process why command frame-relay cir allows
> > IN and OUT direction?
> >
> > Thanks.
>
>
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