From: Andy (trung@vnsystem.net)
Date: Mon May 23 2005 - 04:44:17 GMT-3
Hi Zeng,
The example posted by Sean is definitely demonstrate the use of policing and
marking tool.
I think you should be armed with DQoS. This is the one in your "must read"
ccie books.
Regards
Andy
----- Original Message -----
From: "ccie zeng" <ccie.candidate@gmail.com>
To: "Trung@" <trung@vnsystem.net>
Sent: Monday, May 23, 2005 1:38 AM
Subject: Re: Bc and Be
Hi Trung:
Thanks for your information.
In your statement it says both of them will calculating be which is
acutally Bc+Be, does that mean I should configure be as 1000, and CAR
and CB will know that excess burst should be 2000???
Just want to confirm, in policing CAR and CB, should I configure be as
2000 or 1000 if I want to have excess burst of 1000 bytes.
Thanks
Zeng
On 5/22/05, Trung@ <trung@vnsystem.net> wrote:
>
> 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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