Re: Bandwidth on interface

From: Peter McCreesh (petermccreesh@gmail.com)
Date: Sun Jan 15 2006 - 08:41:18 GMT-3

I see what you mean.

It'll probably work as the default should be 1544K as you have said but
might be one of those for the proctor to clarify I guess.

On 1/15/06, InderpalS@mindscapeit.com <InderpalS@mindscapeit.com> wrote:
>
> Well said Pete but now the point is what is the best practice in terms of
> ccie lab? If asked to guarantee 256k bandwidth for a class and physical
> interface speed is T1, will it make any difference if bandwidth is not set
> on interface?
>
> ------------------------------
> *From:* Peter McCreesh [mailto:petermccreesh@gmail.com]
> *Sent:* Sunday, January 15, 2006 3:19 PM
> *To:* InderpalS@mindscapeit.com
> *Cc:* ccielab@groupstudy.com
> *Subject:* Re: Bandwidth on interface
>
> I think it determines what is available from the BW command on the
> interface and if this is, say, 64K and you set a policy to apply 128K to a
> class, it won't let you as it will give the following error message (if the
> class-default is assigned 128k and applied to int s0/1):
>
> I/f Serial0/1 class class-default requested bandwidth 128 (kbps),
> available only 48 (kbps)
>
> So the BW needs to be correctly set (or at least set above what you need)
> as far as I can see but i am open to correction on this.
>
> Regards,
>
> Pete
>
>
> On 1/15/06, InderpalS@mindscapeit.com <InderpalS@mindscapeit.com > wrote:
> >
> > I know that default is 75% minus (bandwidth for priority queues) but if
> > bandwidth value is given in kbps under policy map how does it help router
to
> > set bandwidth value under interface?
> >
> > ------------------------------
> > *From:* Peter McCreesh [mailto:petermccreesh@gmail.com]
> > *Sent:* Sunday, January 15, 2006 2:58 PM
> > *To:* InderpalS@mindscapeit.com
> > *Cc:* ccielab@groupstudy.com
> > *Subject:* Re: Bandwidth on interface
> >
> > Hi Inder,
> >
> > The fact that by default CBWFQ only uses 75% of available BW, this may
> > affect the amount you can assign to each class.
> >
> > Other than that, i'm not sure.
> >
> > Regards,
> >
> > Pete
> >
> >
> > On 1/15/06, InderpalS@mindscapeit.com < InderpalS@mindscapeit.com >
> > wrote:
> > >
> > > Hi Group,
> > >
> > >
> > >
> > > When using CBWFQ, it is necessary to set interface bandwidth?
> > >
> > >
> > >
> > > Scenario 1---------> I guarantee bandwidth for a class using Bandwidth
> > > (
> > > )kbps command in policy map
> > >
> > >
> > >
> > > Policy-map policy1
> > >
> > > Class class1
> > >
> > > Bandwidth 256
> > >
> > >
> > >
> > > If we still need to set bandwidth on interface then why since we are
> > > giving
> > > guaranteed bandwidth value in policy map.
> > >
> > >
> > >
> > > Scenario 2---------> I reserve bandwidth for a class using bandwidth
> > > percent
> > > command in policy map
> > >
> > >
> > >
> > > Policy-map policy1
> > >
> > > Class class1
> > >
> > > Bandwidth percent 25
> > >
> > >
> > >
> > > I understand in this scenario, interface bandwidth needs to be set so
> > > that
> > > router can calculate available bandwidth and assign to class.
> > >
> > >
> > >
> > >
> > >
> > > Any inputs are appreciated!
> > >
> > >
> > >
> > > Regards,
> > >
> > > Inder
> > >
> > > 1/15/2006 10:55:46 AM
> > >
> > > Disclaimer
> > >
> > >

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