From: Popgeorgiev Nikolay (nikolay.popgeorgiev@siemens.com)
Date: Wed Jan 25 2006 - 07:04:18 GMT-3
Hello,
Let me explain how I understand the difference between the two. If I am wrong someone will correct me.
Shapping normally is used on the exit of your network going to another place where you are not sure if they can accept the rate at which you send traffic. For example on a frame realy link you have purchased 128Kbit/s garanteed speed (CIR), but your interface access speed is E1 - 2Mbit/s. So if your provider is congested and is able to give you only these 128Kbit/s you have to shape the traffic on your E1 interface outgoing to the provider to 128Kbit/s.
Policing is usualy on the provider's side on the interface where your traffic is arriving. And it is used to drop (or mark) your incoming traffic which is above the policing rate. Usualy to the garanteed rate which was given to you (128Kbit/s in our case).
So if you want your traffic NOT to be POLICED by the service provider you are SHAPPING it.
Best,
Nick
-----Original Message-----
From: Jens Petter Eikeland [mailto:jenseike@start.no]
Sent: Wednesday, January 25, 2006 9:53 AM
To: ccielab@groupstudy.com
Subject: policing and shaping
Hi all,
I have a wuestion about this two features. I want to limit the bandwith for
some ip addresses behind an interface to a specific bandwith both in and
out.
From what I understand there are two ways that I could do this. Policing and
shaping commands. I understand also that policing you can regulate in and
out on the same interface and shaping you can only regulate out.
So what is the difference here between this two. My initial thought was to
use shaping, but could I use policing to this task also? Why or why not
Jens Petter Eikeland
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