From: Jason Madsen (madsen.jason@gmail.com)
Date: Sun Aug 17 2008 - 17:03:20 ART
correct me if i'm wrong, but with scenarios such as this one the specific
byte count isn't as important as the required percentages are. for example,
if you are required to have 4 groups at the following perctanges in one
queue list:
15%, 25%, 25%, and 35%
you could do the following:
queue 1 byte-count 1500
queue 2 byte-count 2500
queue 3 byte-count 2500
queue 4 byte-count 3500
the byte counts that i chose are fairly arbitrary, but they do match their
specified required percentages of the total amount e.g.
byte-count total = 10,000 (and of course 100% ;-)
the first byte-count is supposed to be 15%. by dividing 1500 by 10,000 you
see we have the required 15%.
i believe the default byte-count amount if not modified is 1500, so if you
want to use that as an easy reference point you could multiply 1500 by the
number of total queues you are supposed to have and then determine each
queue's unique byte-count based on their percentage of the total you just
came up with.
for example:
if you are required to have 4 queues you could multiply 4 by 1,500 equaling
6,000. using the percentage values i previously mentioned (15, 25, 25, and
35) we could come up with their corresponding byte-count values as such:
.15 x 6,000 = 900
.25 x 6,000 = 1,500
.25 x 6,000 = 1,500
.35 x 6,000 = 2,100
both of the ways I semi-demonstrated should suffice if you're only
requirement is to use a specified number of queues and adhere to specified
percentages for each. i'm sure from an operational / functional standpoint
other factors may need to be considered to ensure optimum efficiency /
performance and such and QoS isn't my strong point so I can't help out much
there.
i'm sure many others in this forum will have much more / better feedback
than this, but i hope this helps nonetheless.
Jason
On Sun, Aug 17, 2008 at 12:41 PM, Roger RPF <rpf@bluemail.ch> wrote:
> I'll try again...can anyone give me a explanation about the math behind?
>
> regards
>
> Roger
>
> -----Urspr|ngliche Nachricht-----
> Von: nobody@groupstudy.com [mailto:nobody@groupstudy.com] Im Auftrag von
> Roger RPF
> Gesendet: Samstag, 16. August 2008 11:01
> An: ccielab@groupstudy.com
> Betreff: custom queueing calculation?
>
> Hi group,
>
>
>
> Somehow I get stuck with the calculation of byte count for the queues in
> custom queueing. Following scenario:
>
>
>
> Serial link, 1.544Mbps
>
>
>
> 15% of bandwidth to queue 1 with packet size of 350 bytes
>
> 45% of bandwidth to queue 2 with packet size of 1200 bytes
>
> 20% of bandwidth to queue 3 with packet size of 750 bytes
>
> 20% of bandwidth to default queue with packet size of 1500 bytes
>
>
>
> Can someone explain me how to calculate the byte count for each queue?
> Somehow I don t get it.....
>
>
>
> Many thanks in advance
>
>
>
> Roger
>
>
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