From: Emre (emrekoyuncu@hotmail.com)
Date: Sat Feb 15 2003 - 00:12:21 GMT-3
The values are about the round trip times. The values I use are
For High Speed Interfaces (HSSI, Ethernet)
normal burst=CIR*0.1875
normal burst = CIR* (1 byte)/(8 bits) * 1.5 seconds
For Slower Interfaces
normal burst=CIR/2000 (This is an approximate value)
Extended burst value depends on your wishes. But to consider extended burst
as 0 , it must be equal to normal burst.
Regards
Emre Koyuncu CCIE #10916
----- Original Message -----
From: "george gittins" <g.gittins@edinburg.esc1.net>
To: <ccielab@groupstudy.com>
Sent: Friday, February 14, 2003 12:10 PM
Subject: question on rate limit
> I been reading up on Qos and I have somewhat difficult in grasping the
> following command.
>
> Rate limit . reading from the book and taking one example like
>
>
>
> Rate-limit input 450000 22500 22500 confirm-action
>
>
>
> Now I don't know how to calculate the 22500 value, or where it comes from.
> On the book it explains that the link is a ds-3 and and the objective is
> to control that link not exceed , I understand that part and how to
classify
> it once the traffic arrives , its just the value of bps burst-normal
> burst-max.is there a formula?
>
>
>
> rate-limit {input | output} [access-group [rate-limit] acl-index] bps
> burst-normal burst-max conform-action
>
>
>
>
>
> George Gittins
>
> Network and Computer Maintenance Supervisor
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