From: paul cosgrove (paul.cosgrove@gmail.com)
Date: Tue Mar 10 2009 - 15:01:06 ARST
On Tue, Mar 10, 2009 at 8:01 AM, Dale Shaw <dale.shaw@gmail.com> wrote:
> Hi,
>
> On Tue, Mar 10, 2009 at 6:48 PM, Godswill Oletu <oletu@inbox.lv> wrote:
> > Though you have allocated 95% in your policy statements; you are actually
> > only using 95% of 75% of the interface bandwidth (or around 71.24% of
> 100%
> > of the interface bandwidth).
> > <assuming max reseved bandwidth is left at its default of 75%>
>
> Hmmm..
>
> > If you reduce or increase the max reserved bandwitdth under the
> interface;
> > the real bandwith allocated to each of your class maps will be
> recalculated
> > and change accordingly.
>
> Did you have a closer look at the 'show policy-map interface' output?
> It clearly shows "bandwidth percent 70" resulting in a 70,000kbps
> bandwidth allocation to the class.
>
> > So, the answer to your question is no.
>
> I think the key may be found in the IOS the original poster is running.
>
> From:
> http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6558/white_paper_c11-481499.html
>
> "max-reserved-bandwidth Command
> The max-reserved-bandwidth command no longer affects the amount of
> bandwidth available to a service policy. Any policy-map can allocate
> up to 100% of the bandwidth without the need of the
> max-reserved-bandwidth command. The max-reserved-bandwidth command was
> used in previous IOS releases in order to overcome the restriction of
> allocating 75% of the bandwidth to user-defined classes. In HQF, that
> restriction does not exist anymore."
>
> And, for reference, here's Pavel Bykov's research from the archives:
> http://www.boxoid.org/cisco/MAX-RESERVED-BANDWIDTH-AND-CBWFQ.pdf
>
> cheers,
> Dale
>
>
The command reference for max-reserved-bandwifth also mentions this change.
http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_m1.html#wp1037779
12.4 (20)T. Support was added for HQF using the Modular Quality of Service
(QoS) Command-Line Interface (CLI) (MQC). *Note *This is the last T release
in which the command is supported
Paul.
Blogs and organic groups at http://www.ccie.net
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