From: Katson Yeung (kyeung@xxxxxxxxxxxxxx)
Date: Thu Jun 20 2002 - 11:31:25 GMT-3
Thanks Mamoor, that is correct.
One more question about the CIR.
According to all the materials I read, the recommended value for CIR is
set it to Access-rate. So, there is a question:
R1s0 ------ FR -------- s0R2
R1s0 = 1.544Mbps
R2s0 = 128kbps
CIR = 64k. (I know it is = mincir, irrelevent to the question, but list it
out anyway.)
At R1,
should I set the CIR as 1544000 or 128000?
I strongly think that it is no point to set it as 1544000 since the port
speed at another side is 128000, there is no way that it R2 can receve
data in that rate.
On Wed, 19 Jun 2002, Ahmed Mamoor Amimi wrote:
> minCIR = Guranteed rate that provider promised
> CIR = AR
> and AR = Access-Rate . This is the rate of transmit and recieve of the
> interface.
>
> Like for example provider agree to give u a min of 64k, but ur interface can
> support upto 1.54Mb.
> U have to negotiate with the provider that how much i can burst above my
> minCIR. The bursting
> totally depends upon the AR or CIR. The more the AR the more u can burst.
> (but depend upon
> the provider that allow u bursting).
>
> Hope i have cleared my point.
>
> -Mamoor
>
>
>
> ----- Original Message -----
> From: Nguyen, Thai <Thai.Nguyen@auspost.com.au>
> To: 'Erhan Kurt' <kurt@superonline.net>; Katson PN Yeung <kyeung@hkcix.com>;
> Michael Popovich <m.popovich@mchsi.com>; CCIE GROUPSTUDY
> <ccielab@groupstudy.com>
> Sent: Thursday, June 20, 2002 5:00 AM
> Subject: RE: FRTS
>
>
> > Hi,
> >
> > I am having difficulty in understanding the difference between minCIR and
> > CIR.
> > Typically minCIR is the guarantee from the service provider, so how and
> what
> > would we use to determine the CIR. Can someone shed some light.
> >
> > Thank in advance.
> >
> > -----Original Message-----
> > From: Erhan Kurt [mailto:kurt@superonline.net]
> > Sent: Tuesday, June 11, 2002 5:38 PM
> > To: Katson PN Yeung; Michael Popovich; CCIE GROUPSTUDY
> > Subject: RE: FRTS
> >
> >
> > For example, in voice, Tc=125 msec may cause pain :)
> >
> >
> > Never Ever Give Up,
> > Erhan
> >
> >
> > -----Original Message-----
> > From: Katson PN Yeung [mailto:kyeung@hkcix.com]
> > Sent: 11 Haziran 2002 Sal} 10:39
> > To: Erhan Kurt; Michael Popovich; CCIE GROUPSTUDY
> > Subject: RE: FRTS
> >
> >
> > A minor correction about "frame-relay traffic-rate" commend in the
> > map-class frame-relay.
> >
> > After you specified traffic-rate, everything displayed will be in
> > bit-per-second, but internally all other values, such as Bc, Be, CIR,
> > mincir are still be calculated in tc=125ms.
> >
> >
> > At 03:00 PM 6/11/2002, Erhan Kurt wrote:
> > >Tc=Bc/CIR
> > >
> > >Look at output of time interval as an important thing in QoS.. With
> > >traffic-rate, you cannot specify any Tc (default=125 msec).
> > >
> > >
> > >-----Original Message-----
> > >From: Michael Popovich [mailto:m.popovich@mchsi.com]
> > >Sent: 09 Haziran 2002 Pazar 23:49
> > >To: CCIE GROUPSTUDY
> > >Subject: FRTS
> > >
> > >
> > >What is the difference between this:
> > >
> > >map-class frame-relay p2p
> > > frame-relay cir 400000
> > > frame-relay bc 8000
> > > no frame-relay adaptive-shaping
> > >
> > >Interface Se0/0.1
> > > Access Target Byte Sustain Excess Interval Increment
> > Adapt
> > >VC List Rate Limit bits/int bits/int (ms) (bytes)
> > >Active
> > >104 400000 1000 8000 0 20 1000 -
> > >
> > >and this:
> > >
> > >map-class frame-relay p2p
> > > frame-relay traffic-rate 400000 408000
> > > no frame-relay adaptive-shaping
> > >
> > >Interface Se0/0.1
> > > Access Target Byte Sustain Excess Interval Increment
> > Adapt
> > >VC List Rate Limit bits/int bits/int (ms) (bytes)
> > >Active
> > >104 400000 7250 400000 8000 125 6250 -
> > >
> > >
> > >
> > >I see some differences in the output but could someone explain the
> > >functional differences here and what impact it would have.
> > >
> > >I have been looking at some lab questions that require setting up
> > >traffic shaping and give you a cir and a bir value. The solution used
> > >the frame-relay traffic-rate under the map-class where as I was looking
> > >towards setting the CIR and the Bc values. I am a little confused on
> > >the BIR value.
> > >
> > >TIA
> > >
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