From: Scott Morris (swm@emanon.com)
Date: Mon Jan 13 2003 - 01:19:08 GMT-3
How do you choose the denominator? You make it up as you go along. :)
You determine how aggressively you want to empty the queue. At 20
packets deep, you'll drop two of them given the example below. If
you're not being nice about it, make your denominator 2 and you'll cut
the queue depth in half. :)
Hope that helps,
Scott
-----Original Message-----
From: Solomon Ghebremariam [mailto:sghebrem@cisco.com]
Sent: Sunday, January 12, 2003 4:02 PM
To: Scott Morris
Cc: 'pita40'; ccielab@groupstudy.com
Subject: RE: WRED
Scott
Ignore my previous e-mail. Now back to your solution. We can
mark
the traffic of interest at all ingress points of the router. My question
is
when you apply red parameters based on the dscp value: random-detect
dscp
15 20 40 10 (telnet traffic being marked with dscp value of 15). How do
we
decide probability denominator (I chose the default value of 10 here)
and
also how do we account for the telnet traffic generated by the router we
are dealing with?
Thanks,
Solomon
At 11:15 AM 1/12/2003 -0500, Scott Morris wrote:
>There are a couple different ways to do it, but the bottom line is that
>you classify your traffic before deciding how to handle it.
>
>For example, set up a CBWFQ and one queue deals with telnet traffic.
>Within this queue you use random-detect with the parameters you have
>mentioned.
>
>Another way is to mark the traffic on ingress perhaps even with policy
>routing. Set a DSCP tag onto the traffic. Then use random-detect dscp
>with the values you have listed on the egress point.
>
>AFAIK, there isn't an ACL parameter on any of the random-detect command
>lines.
>
>Enjoy!
>
>Scott
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
>pita40
>Sent: Sunday, January 12, 2003 10:11 AM
>To: ccielab@groupstudy.com
>Subject: WRED
>
>
>I am trying to configure WRED. I can configure WRED based on precedence
>but I am having difficulty finding in CCO how to configure based on
>different types of ip traffic.
>
>For example.
>
>Configure WRED so that telnet traffic will be randomly dropped if queue
>lenght is over 20 and completely droped if over 40
>
>I am having proble with specify telnet traffic in the configuration.
>Please help. . .
.
This archive was generated by hypermail 2.1.4 : Sat Feb 01 2003 - 07:33:48 GMT-3