From: John Moor (johmoor@gmail.com)
Date: Fri Nov 17 2006 - 13:27:41 ART
On 11/17/06, John Moor <johmoor@gmail.com> wrote:
>
> Yes guys I know this consideration about TCP sessions drop and slow down.
> The thing which does interest me the most is:
>
> 1) How much could this imact the network. How much benefit/speed anything
> else we can get when using shaping instead of policing for outside traffic
> on the outside interface of the customer network?? Are there some
> applications which would very much depend on what is configured shaping or
> policing?? Some examples...
>
>
> P.S To SavJani: If we don't want dorp our own traffic we wouldn't
> configured anything either policing or shaping correct??? From this I would
> probably formulate following subquestion:
>
> What could be bad.... if we do not configure shaping at all on the outside
> interface?? Say Provider have configured policing and we didn't configure
> anything...
>
>
> On 11/17/06, SAVJANI, HITESH, WWCS <hitesh@att.com> wrote:
> >
> > John,
> >
> > Here is the way I understand.
> >
> > 1 Shaping on the enterprise edge : Being a customer we would want to
> > push as much data as we can without dropping anything. If we use
> > policing we will be droping our own traffic which will not make any
> > sense. Will it?
> >
> > 2 Policing on the Provider edge : Being a service provider, I wouldn't
> > want to allow my customer to send anything more than he is paying for.
> > So, I will drop anything above the limit. Another reason is sometimes
> > being a provider I will sell my 100 Mb pipe as 200 Mb ;-). It does
> > happen & is called oversubscribing. In this case I would definitely want
> > my customer to stick to his allocated bandwidth.
> >
> > Shaping should be used when you don't want traffic to get dropped.
> > Policing will drop all the traffic which is more than the value
> > configured. I would not suggest to use policing on an interface going to
> > the provider. However you may want to use policing inbound on that same
> > interface. It's all based on what you want to accomplish.
> >
> > HTH,
> >
> > Hitesh Savjani
> > CCIE # 17151
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> > John Moor
> > Sent: Friday, November 17, 2006 9:51 AM
> > To: Cisco certification
> > Subject: shaping vs policing real life
> >
> > Hello guys,
> >
> > 1. We all know the difference between policing and shaping (how they
> > drop
> > the packets). Also usually in the real life policing is configured on
> > the
> > provider edge and shaping is configured on the customer edge.
> >
> > 2. Guys could you please explain me why do we use shaping on the
> > enterprise
> > edge and not policing. Could you please give me a couple of real life
> > theoretical examples when it could be logically explained why using
> > shaping
> > is much better than using policing??
> >
> > Thanks,
> >
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