GroupStudy.com GroupStudy.com - A virtual community of network engineers
 Home  BookStore  StudyNotes  Links  Archives  StudyRooms  HelpWanted  Discounts  Login
Re: Need Explanation on WRED posted 01/10/2008
[Chronological Index] [Thread Index] [Top] [Date Prev][Date Next] [Thread Prev][Thread Next]


heyy,

and again mistake, 2^(-n),  (2 power of -n) ,

hehehe,

how many mistakes, definitely had no rest last night :)

Regards,

On Jan 10, 2008 10:29 AM, George Goglidze <goglidze@xxxxxxxxx> wrote:

> Sorry when I pasted the formula I did not notice it did not paste it ok.
> because it must be 2^n (2 power of n), not 2-n.
>
> Regards,
>
>
> On Jan 10, 2008 10:27 AM, George Goglidze < goglidze@xxxxxxxxx> wrote:
>
> > 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@xxxxxxxxx> 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.
> > >
> > >
> > > _______________________________________________________________________
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html