From: sekchye goh (sekchye@gmail.com)
Date: Fri Jul 14 2006 - 04:42:42 ART
Hi
frame-relay Bc is in bits. Since R1 & R3 shld be able to transmit a
max of 3584 bytes per shaping interval, & 1 byte = 8 bts,
frame-relay Bc = 3584 X 8 = 28672 bits
HTH.
On 7/14/06, spycharlies@hotmail.com <spycharlies@hotmail.com> wrote:
> Hey Guys, i came across this question in one of the workbooks(IEWB), i totally have no idea on how the Bc was calculated.
>
>
>
> R1,R2 & R3's serial interface connects to the frame cloud
>
> R1 supports maximum transmission rate of 896kbps
> R2 -> max. of 640kbps
> R3 -> max. of 1536kpbs
>
> Task
> -----
> Configure Frame Relay traffic shaping on these devices to allow
> the highest possible average rate without any circuit becoming overwhelmed.
>
> R1 & R3 shld be able to transmit a max of 3584 bytes per shaping interval
> on the circuit btw them, while R2 & R3 shld be able to transmit a max of 2560 bytes.
>
> Here is the solution
> ---------------------
> R1:
> map-class frame-relay 896Kbps
> frame-relay cir 896000
> frame-relay bc 28672
> !
> interface Serial0/0
> frame-relay class 896Kbps
> frame-relay traffic-shaping
>
>
> R2:
> ----
> map-class frame-relay 640Kbps
> frame-relay cir 640000
> frame-relay bc 20480
> !
> interface Serial0/0
> frame-relay class 640Kbps
> frame-relay traffic-shaping
>
>
> R3:
> ----
> map-class frame-relay 640Kbps
> frame-relay cir 640000
> frame-relay bc 20480
> !
> map-class frame-relay 896Kbps
> frame-relay cir 896000
> frame-relay bc 28672
> !
> interface Serial1/0
> frame-relay traffic-shaping
> frame-relay interface-dlci 301
> class 896Kbps
> frame-relay interface-dlci 302
> class 640Kbps
>
>
> Any hints on how the Bc was calculated????
>
>
> thanks in advance
>
>
> cheers
> uyota
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Tue Aug 01 2006 - 07:13:47 ART