From: RSiddappa@xxxxxxxxxx
Date: Wed Feb 13 2002 - 04:50:48 GMT-3
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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