From: Sage Vadi (sagevadi@yahoo.co.uk)
Date: Sun Feb 23 2003 - 01:24:04 GMT-3
Hello Daniel Cisco Group Study ;-)
Okay I only have one dispute about your figures, the
way in which you evaluated the sum for your Be of
2400.
According to CCO, doc title, "configuring FRTS", the
Be is "amount of excess data allowed to be sent during
the _FIRST TC INTERVAL_..." <snip_crap>.
Therefore, I would configure my bc as thus:
frame-relay bc 19200
URL for doc:
http://www.cisco.com/en/US/tech/tk713/tk237/technologies_configuration_example09186a00800942f8.shtml
read the frame relay Be part and let me know what you
think.
Cheers,
Sage
--- Daniel Cisco Group Study <danielcgs@imc.net.au>
wrote: > I would have chosen the following parameters:
>
> frame-relay cir 9600 (in bits/s)
> frame-relay bc 1200 (in bits) -->( cir/8 )
> frame-relay be 2400 (in bits) -->( 19200 / 8)
>
> I have assumed a time interval of 125ms.
>
> So, if the burst is 19600 bits per second, then
> be=19200 x 0.125 = 2400.
>
> ie, the frame-relay interface would transfer at 9600
> + 19200 = 28800 bits/s in the first Tc.
>
> Anyone second this?
>
> Daniel
>
>
> -----Original Message-----
> From: Sage Vadi [mailto:sagevadi@yahoo.co.uk]
> Sent: Saturday, 22 February 2003 13:09
> To: ccielab@groupstudy.com
> Subject: FRTS: Bc & minCIR
>
>
> All,
>
> Q) Configure your frame-relay network to have a
> committed information rate of 9,600 bps and a burst
> size of 19,200 bps.
>
> So would this be correct - ?
>
> frame-relay CIR 9600
> frame-relay Bc 9600
>
> The Bc figure is what I am concerned about. Reading
> the documentation, CCO states the peak is = CIR +
> Be.
> Therefore that would mean CIR=9600 + Be = 19200, so
> I
> arrived @ Bc figure of 9600.
>
> Also in the traffic-rate command it is explained
> that
> the Be value is calculated from subracting the
> average
> from the peak. In my case average would be 9600,
> minus
> this from a peak of 19200 would also equal 9600.
>
> Furthermore I have a question about minCIR -
> according
> to CCO, "rate values greater than 2048 must be
> entered
> with trailing zeros. For example, 2048000 and
> 5120000"
> - what on earth does that mean? And why do you have
> to
> do this???
>
> Lastly if the minCIR value cannot be supported, the
> call is cleared (direct quote CCO). Does this mean
> that CIR by itself is not as stringent as the
> minCIR,
> so that would mean CIR does some negotiation with
> the
> endpoint - how does this work?
>
> rgds,
> Sage
>
>
>
>
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