RE: MDP .- WRED

From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Mon Jul 03 2006 - 03:22:28 ART

Petr, that was very informative.

 

But I'm looking for the formula here.

 

So if the Theory Says that the MPD is the fraction of packets drops, how
many packets are dropped using that Config that you posed ? 512 of 20?

0,0390625 when the Average Q Depth is 20?

Thanks

 

 

  _____

De: petrsoft@gmail.com [mailto:petrsoft@gmail.com] En nombre de Petr
Lapukhov
Enviado el: Lunes, 03 de Julio de 2006 01:36 a.m.
Para: Victor Cappuccio
CC: Cisco certification
Asunto: Re: MDP .- WRED

 

Victor,

It may be set separately for precedence or dscp value.
There are some basic default, at the same time.

e.g.

Rack1R6(config-if)#random-detect
Rack1R6(config-if)#random-detect precedence 0 10 20 512

0 - precedence value
10 - min thresh
20 - max thresh
512 - MPD 

-- 
Petr Lapukhov, CCIE #16379
petr@internetworkexpert.com

Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 
Outside US: 775-826-4344

2006/7/3, Victor Cappuccio <cvictor@protokolgroup.com>:

Hi guys,

I just can not get what they are trying to say
http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_configuratio

n_guide_chapter09186a00800c60d9.html#1000915

The mark probability denominator is the fraction of packets dropped when the
average queue depth is at the maximum threshold. For example, if the
denominator is 512, one out of every 512 packets is dropped when the average

queue is at the maximum threshold.

But then the MAX-TH of the Q depth is set to what number?  512??

I think that they forgot to tell that

Opinions?

Thanks
Victor.-

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