From: George Goglidze (goglidze@gmail.com)
Date: Thu Jan 10 2008 - 07:27:37 ARST
Hi There,
average = (old_average * (1-2 -n)) + (current_queue_size * 2 -n)
This is how it calculates average queue. where n is exponential weight
factor.
Here's the link:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos_c/fqcprt3/qcfconav.htm
When you set mark probability let's say X, it when it gets to MAX THRESHOLD
it will drop 1 of every X packets.
and it will start dropping when it will go over MINIMUM THRESHOLD.
The rate of packet drop increases linearly as the average queue size
increases, until the average queue size reaches the maximum threshold. <<<
this is from the above link as well.
Regards,
On Jan 9, 2008 12:38 PM, abdul muhammed <abdulmuri@gmail.com> wrote:
> Hi,
>
> in configuring WRED using Random-detect interface command based on IP
> precedence where the Precedence, Min-threshold, Max-threshold and
> Mark-prob--denominator parameters are deployed.
>
> 1. what does my average queue length represent:
>
> 2. why should packet be drop when my average queue lenght equals the
> Min-threshold and not just when it equal the Max threshold for that
> precedence.
>
> I need explanation on this.
>
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