From: Mohamed Saeed (mohamed_saeed2@rayacorp.com)
Date: Wed Oct 04 2006 - 06:12:00 ART
Hi David,
In legacy traffic shaping, I think there is no default value for the
internal time interval (Tc). When you configure a certain CIR value, Bc
and Tc are calculated automatically.
Regards
Mohamed Saeed, CCNP - CCIP
________________________________
From: david robin [mailto:robindavi@gmail.com]
Sent: Wednesday, October 04, 2006 11:04 AM
To: Mohamed Saeed
Subject: Re: "traffic-shape rate" command
Dear Mohamed,
I think traffic shaping is the same as frame relay traffic shaping
regarding the equation
bc = CIR * TC with TC = 125 ms
so it is relative to you what you want to do, it you want to mantain for
example 1 mega CIR and to be burst to 2 M in spikes you can configure it
as follow:
traffic-shape group 101 1000000 125000 125000
best regards,
On 10/2/06, Mohamed Saeed <mohamed_saeed2@rayacorp.com> wrote:
Hi All,
You can configure generic traffic shaping using the following interface
level command:
traffic-shape rate bit-rate [burst-size [excess-burst-size]]
[buffer-limit]
I have two questions regarding this command. First, you can configure
many "burst-size" (Bc) that would achieve the same target bit rate. The
point is that when you change the value of the "burst-size", the
internal time interval will change accordingly to achieve the configured
target bit rate. If this is the case, what benefit I could get from
changing the value of the "burst-size". I could simply leave it
untouched and let the router calculates its value.
The second question, how does the "buffer-limit" parameter affect the
performance of the traffic shaping?
Could anyone clarify these two points?
Regards
Mohamed Saeed, CCNP - CCIP
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