From: MADMAN (dmadlan@xxxxxxxxx)
Date: Tue Mar 05 2002 - 19:22:45 GMT-3
In frame CIR is what the provider is committing to providing you, any
extra bandwidth is a bonus. You can definately go beyond CIR and in
some cases you can get full line rate continuously, i.e. your sites
connect to the same switch. Generally congestion is on the NNI's. I
CIR is determined by your provider, we generally set CIR at 1/2 line
rate. We don't monitor CIR but we can look at the switch and see the
statistics to determine if you are exceeding CIR and if were dropping
packets, amber and red frames respectively. We can also put together
fancy frame rely reports detailing your utililization though I think
this is an extra goodie for a nominal fee.
When you are talking CIR and MINCIR and in referance the FRTS then the
ballgame changes. CIR is your line rate, MINCIR is CIR, makes sense
no?!?
Dave
"Williams, Glenn" wrote:
>
> Hi,
>
> I realize that maximum line rate will limit your CIR because that is the
> maximum you can ever push out. But other than that how is the CIR value
> determined in the real world. Do the providers actually monitor if you go
> above CIR and automatically drop packets, even if there is no congestion in
> the cloud? Can you go above CIR? This is something done in the providers
> switch? Also does the clock rate they set you to formulate into the Be
> value? It seems to me from discussions I have with internal people who
> monitor this stuff that when the provider says CIR, they really mean what we
> understand to be mincir or guaranteed rate. So then, how do we figure
> actual CIR?
>
> GW
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