RE: How to calculate CAR?

From: tom cheung (tkc9789@xxxxxxxxxxx)
Date: Wed Nov 14 2001 - 14:55:16 GMT-3


   
Wade,
The original question states that "commit access rate 1.544M and burst size
is 2.048M". Does that implies that it allows an additional 2.048M of burst?

Tom

>From: "Wade Edwards" <wade.edwards@powerupnetworks.com>
>To: "tom cheung" <tkc9789@hotmail.com>, <kevin@btamail.net.cn>,
><ccielab@groupstudy.com>
>Subject: RE: How to calculate CAR?
>Date: Wed, 14 Nov 2001 09:33:39 -0600
>
>The rate-limit command you specified is going to allow 1.544Mb normal
>traffic then allow another 2.048Mb of burst traffic then it will drop
>all traffic after 3.592Mb. The numbers should be 1544000 63000 63000.
>This will give you 1.544Mb normal traffic then allow another .504Mb
>(63000 bytes x 8 gives you 504000 bits or .504Mb) for a total of 2.048Mb
>of traffic then all traffic will be dropped.
>
>The burst numbers are in addition to the normal traffic and the second
>and third numbers are in bytes and the first number is in bits. Hope
>this helps.
>
>L8r.
>
>-----Original Message-----
>From: tom cheung [mailto:tkc9789@hotmail.com]
>Sent: Tuesday, November 13, 2001 8:03 PM
>To: kevin@btamail.net.cn; ccielab@groupstudy.com
>Subject: Re: How to calculate CAR?
>
>
>rate-limit in 1544000 256000 256000 conform transmit exceed drop
>
>
> >From: Kevin <kevin@btamail.net.cn>
> >Reply-To: Kevin <kevin@btamail.net.cn>
> >To: "ccielab@groupstudy.com" <ccielab@groupstudy.com>
> >Subject: How to calculate CAR?
> >Date: Wed, 14 Nov 2001 9:18:52 +0800
> >
> >Hello all, I do learn Commit Access Rate(CAR).
> >I found there are three parameter about car.
> >If I want to give one my custom a contract bandwidth on FastEthernet
>which
> >commit access rate 1.544M and burst size is 2.048M. How to setup the
>second
> >and third parameter on "rate-limit" command. Of course the first
>parameter
> >is 1544000, but which value is precision for normal burst size and max
> >burst size.



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