From: Ahmed Mamoor Amimi (mamoor@xxxxxxxx)
Date: Wed Feb 13 2002 - 15:40:38 GMT-3
wat about if we give not to drop packets that are of precedence 0 to WRED
then i think it will not
drop non-ip packets.....
my 2 cents
-Mamoor
----- Original Message -----
From: <RSiddappa@NECBNS.com>
To: <roybustos@hotmail.com>; <mamoor@ieee.org>
Cc: <ccielab@groupstudy.com>
Sent: Wednesday, February 13, 2002 12:50 PM
Subject: RE: CAR and WRED
>
>
> Since the WRED is based on eh precedence value in the TOS field of the
IP,
> it good for TCP and any other non IP traffic will be treated with
precedence
> of 0 and will be dropped.
>
> My 2 cents,
>
> R.
>
>
>
>
>
>
>
>
> -----Original Message-----
> From: roy bustos [mailto:roybustos@hotmail.com]
> Sent: Tuesday, February 12, 2002 3:06 PM
> To: Ahmed Mamoor Amimi
> Cc: ccielab@groupstudy.com
> Subject: Re: CAR and WRED
>
>
> WRED only works with TCP and is based on congestion, it will randomly
drop
> packets once your load reaches congestion,
> CAR is a form of rate limiting, and will perform even without congestion.
>
> Roy
> ----- Original Message -----
> From: "Ahmed Mamoor Amimi" <mamoor@ieee.org>
> To: <ccielab@groupstudy.com>
> Sent: Tuesday, February 12, 2002 11:41 AM
> Subject: CAR and WRED
>
>
> > my thinking about CAR and WRED :
> >
> > CAR
> > By CAR u can set normal and max burst then tell if the rate drop from
> > normal then apply precedence or drop or ATM-CLP or QoS or trasmit.
> > General assumption:
> > set min xxx
> > max xxx
> > if min<flow of packet
> > then
> > drop or clp or prec or qos or transmit
> > end
> >
> >
> > WRED
> > Use the random-detect command to enable WRED, which randomly discards
> > packets during congestion based on IP precedence settings
> > General assumption:
> > if RED<flow of packet
> > then
> > {(set precedence 0-7) and (threshold 1-4096)}
> > or
> > set precedence to rsvp packets
> >
> >
> >
> > my thinking is that they both are some what same but CAR is more
flexible
> as
> > it gives u the upper and lower bond of limit
> > to traffic.
> >
> >
> > -Mamoor
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