From: roy bustos (roybustos@xxxxxxxxxxx)
Date: Tue Feb 12 2002 - 18:05:41 GMT-3
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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