Re: Shaping, policing and minimum bandwidth guatantee

Jack,

I think that what they mean is that both shaping and policing restrict the
overall output rate, of the all traffic, to a certain value. They don't
provide any certain guarantees to specific classes of traffic on their own -
it is the queuing mechanism which is responsible for this. For example, you
could use CBWFQ/LLQ inside the shaping queue to provide some
bandwidth/priority treatment.

Regards,

--
Piotr Kaluzny
CCIE #25665 (Security), CCSP, CCNP
Sr. Support Engineer - IPexpert, Inc.
URL: http://www.IPexpert.com
On Thu, Oct 28, 2010 at 6:27 PM, Narbik Kocharians <narbikk_at_gmail.com>wrote:
> I have not read the doc yet but could they be referencing to CBWFQ?
>
> On Thu, Oct 28, 2010 at 9:16 AM, Jack Router <pan.router_at_gmail.com> wrote:
>
> > Hello experts,
> > I am reading the following Cisco document "Comparing Traffic Policing and
> > Traffic Shaping for Bandwidth Limiting"
> > (
> >
> >
> http://www.cisco.com/en/US/tech/tk543/tk545/technologies_tech_note09186a00800a3a25.shtml
> > )
> >
> > Can someone please explain their sentence: "neither mechanism provides a
> > minimum bandwidth guarantee during periods of congestion"
> >
> > I am confused as I believed that there are commands that do just that,
> for
> > example:
> >
> > In legacy configuration:
> > # map-class frame-relay XXX
> > #  frame MINCIR 8000    <--------------------
> >
> > In MQC:
> > # policy-map XXX
> > #  class class-default
> > #   shape ADAPTIVE 8000    <--------------------
> >
> >
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>
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
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