From: Chris Lewis \(chrlewis\) (chrlewis@cisco.com)
Date: Mon Jul 25 2005 - 17:02:43 GMT-3
Aji,
Yours is a good summary IMHO. Some specifics in-line.
Chris
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
san
Sent: Sunday, July 24, 2005 12:53 PM
To: aji nc
Cc: ccielab@groupstudy.com
Subject: Re: Formulas for calculating QOS Values
Aji,
I plan to leave it to default or minimum, if question does not specify.
/SAN
On 5/9/05, aji nc <aji_nc@yahoo.com> wrote:
> Dear all,
>
> Can anybody summarize the formulas for calculating different QOS
> values. I am getting lost by seeing different values at different
> places.I am looking for ccie lab recomendations.
>
> Ratelimit:
> normal burst = configured rate * (1 byte)/(8 bits) *
> 1.5 seconds
>
> extended burst = 2 * normal burst
>
> police in MQC : ? is it the same or something different
>
> FRTS : inside map-class
>
> bc = cir*125/1000 for data
> cir*10/1000 for voice
You pretty much always have to set a Bc value for frame but my
preference is to stay away from Be unless the question specifically has
an excess burst requirement.
>
> be = (ar-cir)*125/1000 data
> be for voice is 0
>
> mincir = cir/2 for data
> mincir = cir for voice
>
> frame-relay traffic-rate command : i am lost ?
Don't worry about it, the only time I believe it is used is on a router
acting as a frame relay switch, which we won't have to face.
>
> MQC based frts:
>
> shape command : is the values are same as above or something diferent
> ?
>
> Generic traffic shaping : fraffic-shape rate
>
> i am lost!!! can anybody help me ?
>
> where do u use gts and where frts ?
You need toreadf and understand all the links off of
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/
qos_vcg.htm
For this specific question, FRTS needs the frame-relay traffic shape
interface command to engage the F/R QoS engine and enables per DLCI
characteristics to be defined. GTS will not be DLCI specific.
Chris
>
> Thanks in advance
>
> Aji.N.C
>
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