From: aji nc (aji_nc@yahoo.com)
Date: Mon May 09 2005 - 11:24:47 GMT-3
Hi James,
Thanks for the info , But i was really looking to
clarify is there any difference between MQC police and
rate-limit calculation, FRTS,GTS, MQC based shaping
calculations and so on...I am ok with Bytelimit
calculations.But i am confused with the above, Please
clarify if possible.
Thanks
Aji.N.C
--- James Matrisciano <jmatrisciano@kenttech.com>
wrote:
> For traffic shapping, you want to use Cir, Be, Bc
> and Te
>
> If you know any of the above mentioned, you can
> figure out the rest with
> this...
>
> CIR X Tc / 1000 = Bc
> CIR / Bc x 1000 = Tc
> CIR - AR x Tc / 1000 = Be
> Bc x 1000 / Tc = Cir
>
>
> On Custom Ques, you need to know how to get the
> percentages for traffic
> to byte counts...
>
> So,
> If you need to allocate 30% of BW for WWW traffic
> with a packet size of
> 1500 bytes
>
> As well Allocate 20% of BW for ftp traffic with a
> packet size of
> 600...do the following
>
> Step 1. Find which has the largest packet
> size....(1500 for www)
>
> Step 2. Divide all other traffic fields by the
> largest packet size
>
> 1500/1500=1
> 1500/600=2.5
>
> Step 3. Multiply the #'s that were given by
> division by the BW
> percentage
>
> (in step 2 1500/1500=1) so 1 x 30% (1x .3) = .3
> (in step two 600/1500=2.5) so 2.5 x .2 (20%) = .5
>
> Step 4. Take that number, normalize it and round up
> if needed:
>
> .3 normalized is 3
> .5 nrmalized is 5
>
> (for something like .75, normalized is 7.5, you then
> need to round up to
> 8)
>
> Step 5. Multiply the normalized number times the
> original byte count.
>
> 3x1500=4500
> 5x600=3000
>
> Now you can build your custom ques:
>
> Queue-list 1 port ip 1 tcp www
> Queue-list 1 port ip 2 tcp ftp
> Queue-list 1 port ip 2 tcp ftp-data
>
> Queue-list 1 que 1 byte-count 4500
> Queue-list 1 que 2 byte-count 3000
>
> Then apply where applicable
>
> Netmasters has a great write up on this in lab 1 I
> believe.
>
>
>
> jm
>
>
> -----Original Message-----
> From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On Behalf Of
> aji nc
> Sent: Monday, May 09, 2005 3:14 AM
> To: ccielab@groupstudy.com
> Subject: Formulas for calculating QOS Values
>
> 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
>
> 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 ?
>
> 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 ?
>
> Thanks in advance
>
> Aji.N.C
>
>
>
>
>
>
>
>
>
>
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