From: Avner Izhar (aizhar@ccbootcamp.com)
Date: Sun Dec 02 2007 - 14:09:33 ART
Hi,
In addition to Tarun's good answer, if the 95% rule will not be followed you will probably loose points :(
BTW, shaping FR using a policy map instead of a map-class, will not cause points decrease since it is answering the task requirements (usually ...).
-------------------------------------------
thanks,
Avner Izhar
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-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Tarun Pahuja
Sent: Sunday, December 02, 2007 05:43
To: Radioactive Frog
Cc: Cisco certification
Subject: Re: Voice lab QoS - which one to follow (SRND or standard)
Importance: Low
Frog,
Use the values from the SRND. The reason the CIR vlaue used is
slightly lower that the actual CIR is because Cisco FRTS does not take
into account frame-relay overhead(header,CRC Check feild) when
performing FRTS. To compensate for the overhead it is recommended to
keep the CIR at 95% of the actual CIR.
This Fact is clearly mention in the "End-to-End QoS Network Design"
book from Cisco Press, Page 479.
HTH,
Tarun
On 12/2/07, Radioactive Frog <pbhatkoti@gmail.com> wrote:
> Hi Gang!
>
> If the question is about FRTS, shell I use CIR& BC value form QoS SRND or
> the general ones?
>
> For example:
>
> *Example1: Standard (without SRND recommendation)
> *SiteA to HQ is 128kbps link
>
> map-class frame-relay siteb-frts
> frame-relay cir 128000
> frame-relay bc 1280 <-------10% of CIR
> frame-relay be 0
> frame-relay mincir 128000
> frame-relay fair-queue
> !
>
> *Example2: Standard (SRND recommendation)
> *SiteA to HQ is 128kbps link
>
> map-class frame-relay siteb-frts
> frame-relay cir 124872 <--------QoS srnd recommendation 95% of actual
> bandwidth
> frame-relay bc 1250
> frame-relay be 0
> frame-relay mincir 124872
> frame-relay fair-queue
> !
>
> Also what if I do not follow the FRTS recommendation from qos srnd, will I
> loose points?
>
>
> Frog
>
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