From: Bob Sinclair (bsin@cox.net)
Date: Sun Jun 27 2004 - 21:19:33 GMT-3
Joe,
WRED will drop UDP traffic, based on precedence or dscp values, but as you
point out, the sender is not going to back off as it would for TCP traffic.
The FRED solution I suggested earlier is UDP-based, but would probably not
be appropriate, since it cannot be combined with a CBWFQ bandwidth
reservation.
Perhaps something along the following lines is what is needed??
policy-map test
class test
bandwidth percent 10
random-detect
set ip precedence 5
police 154400 conform-action transmit exceed-action set-prec-transmit 0
The set/police combo above should result in the first 10% of a T1 set to
prec 5, the remaining set to 0. WRED will more aggressively drop the prec 0
traffic.
Bob Sinclair
CCIE #10427, CISSP, MCSE
www.netmasterclass.net
----- Original Message -----
From: "Joe Chang" <changjoe@earthlink.net>
To: <C.Sammarcellino@sirtisistemi.it>; <ccielab@groupstudy.com>
Sent: Sunday, June 27, 2004 6:12 PM
Subject: Re: Help on QOS
> Can WRED have any affect at all on UDP traffic? WRED works by manipulating
> the TCP layer congestion avoidance mechanisms.
>
> ----- Original Message -----
> From: <C.Sammarcellino@sirtisistemi.it>
> To: <ccielab@groupstudy.com>
> Sent: Sunday, June 27, 2004 1:56 PM
> Subject: Help on QOS
>
>
> > I have the following doble:
> >
> > I want reserve for a application thath use UPD port from 3000 to 5000,
> this
> > application may use 10% of bandwith, but if the taffic excede the 10% i
> > want drop packet aggressively, a other applicatio use ftp-data, ftp-data
> > may use 20% of bandwith.
> >
> >
> > I ask for the correct configuration , because i am not shure if use
> Police,
> > or WRED for aggressive dropping in CBWFQ.
> >
> > Bye
> >
> > Ciro
> >
> > _______________________________________________________________________
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