From: RSiddappa@xxxxxxxxxx
Date: Wed Feb 13 2002 - 12:45:06 GMT-3
Brian,
I agree. I was little short of sleep when I wrote that, Sorry.
R.
-----Original Message-----
From: Brian McGahan [mailto:brian@cyscoexpert.com]
Sent: Wednesday, February 13, 2002 9:44 AM
To: Siddappa, Rajeev; roybustos@hotmail.com; mamoor@ieee.org
Cc: ccielab@groupstudy.com
Subject: Re: CAR and WRED
You're right in the statement that untagged IP traffic, and non-IP traffic
will be treated as IP Prec 0, but not that they will be dropped. The lower
the precedence value, the higher the probability of being dropped. This is
not to say that ANY traffic will be dropped, just that IP prec 7 has less
probability of being dropped than IP prec 0.
Brian McGahan
CCIE #8593
brian@cyscoexpert.com
CyscoExpert Corporation
Internetwork Consulting & Training
http://www.cyscoexpert.com
Voice: 847.674.3392
Fax: 847.674.2625
----- Original Message -----
From: <RSiddappa@NECBNS.com>
To: <roybustos@hotmail.com>; <mamoor@ieee.org>
Cc: <ccielab@groupstudy.com>
Sent: Wednesday, February 13, 2002 1:50 AM
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
This archive was generated by hypermail 2.1.4 : Thu Jun 20 2002 - 13:46:21 GMT-3