From: Anthony Pace (anthonypace@xxxxxxxxxxx)
Date: Tue Jul 23 2002 - 16:42:53 GMT-3
I have 3 QOS questions which there seems to be a difference of opinion
on:
1)If a Hub with a large CIR or AR (1544) and has a Multipoint circuit
and defined several subinterfaces on networks with the spokes which
have smaller CIR or AR (64), should each subinterface have traffic
shaping applied in such a way that the hubs bandwidth is divided up,
and spokes are not overwhelmed, or should each subinterface have
traffic shaping applied in such a way that they could utilize the whole
1544 during times where the other PVC's have no traffic?
2) Is the basis for the Tc calculated by the router, by the configured
CIR/Bc ?
3) Can Be only be invoked if the CIR is less than the AR, and is it
measured in what the burst would be {ie.(32000)} divided by the CIR/Tc
(ie 8). Even though we can only burst in the first Tc and would only
effectivly ever use a fraction of the 32000?
I know these have been discussed before on this list, and are written
about in all the books mentioned on this list and are adressed on CCO
but I have seen a couple of variations between explanations.
Anthony Pace
On Tue, 23 Jul 2002 11:40:51 -0700 (PDT), "Dennis Hartmann"
<sanester8@yahoo.com> said:
> Be VERY wary of the QoS books. A lot of them are
> very bad. Cisco Press has a good one, but I forget
> the name of it. I teach the DQoS and iQoS classes. I
> would be happy to answer any questions.
>
> Sincerely,
>
> Dennis Hartmann
> Instructor-Consultant
> dh8@pobox.com
>
> --- David Wolsefer <DWolsefer@totality.com> wrote:
> > I have found that the previous networkers
> > presentations on QoS are good
> > sources along with the QoS sections of IOS
> > documentation. There are also
> > several QoS books out there, but I haven't had a
> > chance to read them yet.
> >
> > Regards,
> >
> > David Wolsefer, CCIE #5858
> >
> > -----Original Message-----
> > From: Jaspreet Bhatia
> > To: ccielab@groupstudy.com
> > Sent: 7/22/2002 8:34 PM
> > Subject: QOS resources
> >
> > Folks,
> > Can anyone suggest some good
> > resources for brushing
> > up
> > on QOS. Thanks
> >
> > Jaspreet
> >
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