From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Fri Jan 07 2005 - 15:58:15 GMT-3
Reo,
The interface command "bandwidth" specifies the bandwidth value
used in routing metric and MQC available bandwidth calculation. The
"bandwidth" value under the policy-map creates a minimum bandwidth
reservation in the output queue for the specified class. The reason
that it's important to set the interface "bandwidth" command is because
the default may not reflect what is provisioned on the interface.
For example, the default bandwidth value for a serial interface
is 1544Kbps. If then you create a policy-map with the command
"bandwidth percent 50" you are reserving 772Kbps (assuming we are
working with 12.2T). This can be seen by issuing the "show queue
interface serial0" command and looking at how the "available bandwidth"
field changes. By changing the "bandwidth" command on the interface, it
affects what this "available bandwidth" value is derived from.
Keep in mind that the above example is on a point-to-point
serial connection that is not running Frame Relay encapsulation. For
Frame Relay MQC applications there are more factors that come into play,
such as legacy or MQC FRTS.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
24/7 Support: http://forum.internetworkexpert.com
Live Chat: http://www.internetworkexpert.com/chat/
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> reo@chavallos.net
> Sent: Friday, January 07, 2005 12:29 PM
> To: ccielab@groupstudy.com
> Subject: Re: IEWB Lab 2 Task 9.10
>
> I'm sorry.
> I forgot for a moment that it actually uses queues and does not
measure
> amount of bandwidth.
>
> It finally makes sense to me.
>
> Let me just double check this.
>
> If bandwidth on interface set not correctly the bandwidth allocation
for a
> class may not be proper.
> Let's say if we have 512K CIR and need to allocate 256K for a class,
the
> queue for this class will be 50% of MQC queue.
> But if we forgot to set CIR - the class queue will be about 17% only.
>
> Does it make sense?
>
> Thanks
> -R
> #12944
>
>
> ----- Original Message -----
> From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
> To: <reo@chavallos.net>; <ccielab@groupstudy.com>
> Sent: Friday, January 07, 2005 8:21 AM
> Subject: RE: IEWB Lab 2 Task 9.10
>
>
> > Reo,
> >
> > What is your understanding of the bandwidth keyword under an
> > interface vs the bandwidth keyword under the modular QoS policy-map?
> > How are these values interrelated?
> >
> > Brian McGahan, CCIE #8593
> > bmcgahan@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987 x 705
> > Outside US: 775-826-4344 x 705
> > 24/7 Support: http://forum.internetworkexpert.com
> > Live Chat: http://www.internetworkexpert.com/chat/
> >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
Behalf
> > Of
> > > reo@chavallos.net
> > > Sent: Thursday, January 06, 2005 10:26 PM
> > > To: ccielab@groupstudy.com
> > > Subject: Re: IEWB Lab 2 Task 9.10
> > >
> > > Nice to know about MQC queue calculation. Thanks
> > >
> > > Unfortunately, the solution for the task is more that the task
require
> > > (with
> > > is ok for real lab).
> > > Task does not ask to do anything with the queue.
> > > Either solution or task wording need to adjusted.
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: "Brian Dennis" <bdennis@internetworkexpert.com>
> > > To: <reo@chavallos.net>
> > > Cc: <ccielab@groupstudy.com>
> > > Sent: Thursday, January 06, 2005 6:11 PM
> > > Subject: Re: IEWB Lab 2 Task 9.10
> > >
> > >
> > > > You could safely assume that it's a question with a hidden
answer
> > ;-)
> > > >
> > > > As far as "why", read the caution note for the solution.
> > > >
> > > > --
> > > > Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
> > > > bdennis@internetworkexpert.com
> > > >
> > > > Internetwork Expert, Inc.
> > > > http://www.InternetworkExpert.com
> > > > Toll Free: 877-224-8987
> > > > Direct: 775-745-6404 (Outside the US and Canada)
> > > >
> > > >
> > > >
> > > > On Thu, 2005-01-06 at 17:55 -0800, reo@chavallos.net wrote:
> > > > > is this a question with hidden answer?
> > > > >
> > > > > or you actually asking for task wording?
> > > > >
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Brian McGahan" <bmcgahan@internetworkexpert.com>
> > > > > To: <reo@chavallos.net>; <ccielab@groupstudy.com>
> > > > > Sent: Thursday, January 06, 2005 5:16 PM
> > > > > Subject: RE: IEWB Lab 2 Task 9.10
> > > > >
> > > > >
> > > > > > What does the task ask for?
> > > > > >
> > > > > > Brian McGahan, CCIE #8593
> > > > > > bmcgahan@internetworkexpert.com
> > > > > >
> > > > > > Internetwork Expert, Inc.
> > > > > > http://www.InternetworkExpert.com
> > > > > > Toll Free: 877-224-8987 x 705
> > > > > > Outside US: 775-826-4344 x 705
> > > > > > 24/7 Support: http://forum.internetworkexpert.com
> > > > > > Live Chat: http://www.internetworkexpert.com/chat/
> > > > > >
> > > > > >
> > > > > > > -----Original Message-----
> > > > > > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]
On
> > > Behalf
> > > > > > Of
> > > > > > > reo@chavallos.net
> > > > > > > Sent: Thursday, January 06, 2005 6:27 PM
> > > > > > > To: ccielab@groupstudy.com
> > > > > > > Subject: IEWB Lab 2 Task 9.10
> > > > > > >
> > > > > > > I'm at the stage when I'm trying to understand every
little
> > > detail...
> > > > > > >
> > > > > > > Why task gives line speed (512kbps)?
> > > > > > > Why the solution has "bandwidth 512" under the interface?
> > > > > > >
> > > > > > > -R
> > > > > > > #12944
> > > > > > >
> > > > > > >
> > > > > >
> > >
> >
This archive was generated by hypermail 2.1.4 : Wed Feb 02 2005 - 22:10:19 GMT-3