From: Trung@
Date: Sun May 22 2005 - 10:37:32 GMT-3
Hi Zeng,
In traffic shaping, bc & be value are determined differently based on
variant shaping tools.
For GTS, the traffic-shape rate cmd is used with Be setting in bits and is
exactly Be itself.
With CBS, the shape cmd with peak option will cause bc+be to be sent per Tc.
In policing, CB policing and CAR use the same formular in calculatint the Be
which is actually bc+be.
bold value must be entered in bytes.
Andy.
----- Original Message -----
From: "simon hart" <simon.hart@btinternet.com>
To: "ccie zeng" <ccie.candidate@gmail.com>; "Cisco certification"
<ccielab@groupstudy.com>
Sent: Sunday, May 22, 2005 3:40 PM
Subject: RE: Bc and Be
> Zeng,
>
> You are right. If you configure both bc and be to the same value there is
> no extended burst. In order to achieve your stated goal, then bc 1000 and
> be 2000 would be correct.
>
> Be careful when using these police commands, I would recommend that you
> always use the ? prompt to determine whether you need to enter bits or
> bytes.
>
> Also the relationship between bc and be is different when using Traffic
> shaping. When traffic shaping any value of be will be the absolute value
> of
> the burst.
>
> HTH
>
> Simon
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> ccie zeng
> Sent: 22 May 2005 09:30
> To: Cisco certification
> Subject: Bc and Be
>
>
> Hi:
> Could anyone clarify to me, when I asked to configure normal burst
> size 1000 bytes, and excess burst size 1000 bytes for CAR or CB
> policing, should I configure like this ".....bc 1000 be 2000" or just
> "...bc 1000 be 1000".
>
> Based on my understanding if Be is configured as 1000, then there is
> no excess burst, is that right?
>
> Thanks
> Zeng
>
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