From: Ahmed Shams (ahmedshamz@gmail.com)
Date: Wed Mar 01 2006 - 15:01:45 GMT-3
Thank you for your input Brian. Is it true that you are not supposed to
change the Tc value and tweak the Bc and CIR and let IOS determine the Tc
for you?? I don't know where I read this but Cisco doesnt recommend you to
do that..
Please advice..
On 3/1/06, Brian McGahan < bmcgahan@internetworkexpert.com> wrote:
>
> > If no Tc value is given, it defaults to 125 msec (1/8th of a second).
> For
> > MINCIR though, it defaults to half of the configured CIR.
>
> It actually depends on what the CIR is. The higher the CIR the
> lower the default Tc. Technically all you need to do is set the CIR
> value and the IOS will automatically choose the appropriate Tc. You
> really only need to set the Tc when the serialization delay for your
> traffic is an issue. So in other words if the question doesn't state
> what to put just don't put anything.
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
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>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto: nobody@groupstudy.com] On Behalf
> Of
> > Ahmed Shams
> > Sent: Tuesday, February 28, 2006 11:05 PM
> > To: PANDI MOORTHY
> > Cc: Cisco certification
> > Subject: Re: Frame-relay Traffic Shapping Question
> >
> > If no Tc value is given, it defaults to 125 msec (1/8th of a second).
> For
> > MINCIR though, it defaults to half of the configured CIR.
> > > For Voice over Frame though, you have to configure the parameters in
> such
> > a
> > way that they should reflect the Tc value of 10msec 10ms (1/100th of a
> > second).
> >
> > Enable traffic-shaping without specifying any parameters on your frame
> > interface and see what "show traffic-shape" gets you
> >
> > I would recommend you to go to InternetworkExpert.com and read through
> > their
> > white paper on FRTS. Also, their sample lab contains useful
> information on
> > the topic, which atleast I found very interesting easy to understand.
> >
> > HTH
> >
> > On 3/1/06, PANDI MOORTHY <moorthypandi@gmail.com> wrote:
> > >
> > > Hi Group
> > >
> > > Question on the Frame-relay traffic shaping.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > 1) The question is ask to configure provisioned rate on the FR
> > interface,
> > > but doesn't specify the TC, value, so in this case what would be the
> Tc
> > > value should I need to choose. (is it the minimum value 10)
> > >
> > >
> > >
> > >
> > >
> > > 2) I have the configuration as below.
> > >
> > >
> > >
> > > !
> > >
> > > map-class frame-relay DLCI_403
> > >
> > > frame-relay cir 1024000
> > >
> > > frame-relay bc 10240
> > >
> > >
> > >
> > >
> > >
> > > I have CIR 1024k and the BC value as well, I haven't specify the
> minicir
> > > value in this configuration. What would be the minicir value when
> there
> > is
> > > congestion in the network? (Is it the default value 56k?)
> > >
> > >
> > >
> > >
> > >
> > > Please give me your input on this, thanks in advance.
> > >
> > >
> > > Regards.
> > > Pandi
> > >
> > >
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