From: slevin kremera (slevin.kremera@gmail.com)
Date: Tue Aug 14 2007 - 05:22:58 ART
Hi Steve/joseph
Everything seems ok except for Tc.how did they get that... and what
significance does the last part of the question have to the calculation of
Tc
On 8/14/07, Steve <steve.ccie@googlemail.com> wrote:
>
> Hi,
>
> I am a little confused - where does the /1000 come into this equation?
> I understood Bc = CIR * Tc ...?
>
> I have looked at that question as well now and am scratching my
> head.....hope someone can clarify as
> I have been studying the frame shaping lately and can admit that it
> is taking some time to sink into my thick skull.
>
> Cheers,
> Steve
>
>
> On 14 Aug 2007, at 02:43, Joseph Brunner wrote:
>
> > Yo Adrian,
> >
> > The formula to calculate bc is
> >
> > BC = CIR * tc/1000
> >
> > They tell you the tc in these types of questions, so that variable
> > shouldn't
> > be a mystery...
> >
> > That last bit of the question... FRF.12, or fragmentation... they
> > are just
> > matching fragment size to the amount of data you can send in one
> > tc. Just
> > remember the fragment size is entered in bytes (frame-relay fragment
> > command), where the tc is in bits and is not directly set, its
> > actually set
> > by setting the bc!
> >
> > Joe
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> > Behalf Of
> > slevin kremera
> > Sent: Monday, August 13, 2007 9:03 PM
> > To: Cisco certification
> > Subject: iewb v3 lab4 task 8.1 frame-relay QOS
> >
> > Hi Group
> >
> > The CIR part makes sense.But how did he get Bc?? and how is the
> > last bit
> > where it says R1 and R3 should be able to trasmit a maximum of 3584
> > byres
> > shaping interval and R2 and R3 shud be able to transmit a maximum
> > of 2560
> > bytes.
> >
> > Is it that the last bit was used to calculate Bc ? if so how??
> >
> > thks
> >
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