From: Dale Shaw (dale.shaw@gmail.com)
Date: Tue Mar 10 2009 - 06:01:54 ARST
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
Blogs and organic groups at http://www.ccie.net
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