From: Steve (steve.ccie@googlemail.com)
Date: Tue Aug 14 2007 - 05:20:05 ART
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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