From: Rich Collins (nilsi2002@gmail.com)
Date: Thu Apr 03 2008 - 13:32:11 ART
Hi,
I suppose if you are given no additional information then choosing the Cisco
recommendation is your best choice.
Does your solution match the IE answer?
-Rich
On 4/1/08, Saptanshu <saptanshu@yahoo.com> wrote:
>
> Hi,
>
> I just wanted to know how do we calculate cir, bc and be for CAR if the
> bandwidth guarantee is 2.5 Mbps and with burst upto 7Mbps. Guranteed
> transmit aggrement is marked with MPLS EXP 1 and excess of guranteed rate
> within the burst rate should be marked with MPLS EXP 0.
>
> The calculation that i follow is :-
>
> Recommended Burst Values Cisco recommends the following values for the
> normal and extended burst parameters:
>
> mean rate = burst size / time interval normal burst(Bytes) = configured
> rate * (1 byte)/(8 bits) * 1.5 seconds extended burst(Bytes) = 2 * normal
> burst
>
>
> http://www.cisco.com/en/US/docs/ios/12_2/qos/configuration/guide/qcfpolsh.html#wp1000977
>
>
> So for above requirement:-
>
> rate-limit input access-group 100 2500000 468750 937500 conform-action
> set-mpls-exp-imposition-transmit 1 exceed-action-continue
>
> rate-limit input access-group 100 7000000 1312500 2625000 conform-action
> set-mpls-exp-imposition-transmit 0 exceed-action drop
>
> access-list 100 permit ip any any
>
>
>
> Please advise.
>
> Regards
>
> Sap
>
>
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