Re: QoS interpretation

Hi Nick,

Here is my understanding of this question

1) The question does not ask for any bandwidth guarantee, so I rule
out the use of bandwidth statement.If the question would have been "
make sure R5 is guaranteed/assured 2.5mbps of bandwidth on the link"
or something along these lines, I would have gone for the bandwidth
statement. The question talks about the transmission rate and not
bandwidth reservation so it has to be either policing or shaping.
2) Policing could have been a solution but the question does not say
anywhere that traffic exceeding 2.5mbps or 3mbps should be dropped or
any other action should be performed. It simply gives a provisioned
rate and asks us to configure the device to send traffic at these
rates. More than often, a question related to policing would give an
exceed or conform action to perform.
3) Shaping is the option to go for , because of the 2 reasons mentioned above.

Just my 2 cents

Regards,
Ravi

On Tue, Apr 14, 2009 at 11:24 PM, Nick <ccieaz_at_googlemail.com> wrote:
> Hi all,
>
> I still have trouble sometimes with QoS question interpretation.
>
> Take this example from IE lab 18
>
> ".... BB2 will only allow R5 to send traffic across this link at a maximum
> of 2.5mpbs. BB3 will only allow R5 to send traffic into its network at a
> maximum rate of 3mpbs"
>
> How should I interpret this?
>
> I think that you could do this with shaping, policing or bandwidth
> statement. But which is best and why?
>
> Any tips would be great.
>
> (SG uses shaping)
>
> Thanks
>
> Nick
>
>
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Received on Wed Apr 15 2009 - 02:05:11 ART