From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Sat May 06 2006 - 11:33:34 ART
No, you can tell it's relative because it doesn't decrement.
It's actually reserving 50% of what's available (75%), so like you said
the resulting reservation is 3.75Mbps. To fix this either issue the
"max-reserved-bandwidth 100" command on the interface or change
"bandwidth percent 50" to "bandwidth 5000".
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
> forwardtruth@yahoo.com
> Sent: Saturday, May 06, 2006 2:36 AM
> To: ccielab@groupstudy.com
> Subject: Available bandwidth calculation with prior to IOS 12.2
>
> IEWB-RS Lab6 V3 Task 8.1 Breakdown
>
> class-map match-all FTP
> match protocol ftp
> !
> policy-map QOS
> class FTP
> bandwidth percent 50
> !
> interface FastEthernet0/0
> service-policy output QOS
> !
> R1#sh queue e0/0 | in Available
> Available Bandwidth 7500 kilobits/sec
>
> Although 50% of the bandwidth on this interface is reserved for FTP,
it is
> a relative reservation of what is available. Since the available
bandwidth
> on the
> interface is 7.5Mbps, FTP is effectively guaranteed a minimum of
3.75Mbps
> (50% of 75% of 10Mbps).
>
> Since with the older IOS (prior to 12.2) it is relative no absolute,
that
> means 50 % is from 7.5 Mbps (not from 10 Maps) which is equal to 3.75
> Mbps.
>
> If we do calculation for the above assumption:
> 7500 (50*7500/100) = 3750
>
> Should not the available bandwidth be 3750 kbps, instead of 7500 kbps
> (R1#sh queue e0/0 | in Available
> Available Bandwidth 7500 kilobits/sec) ?
>
>
This archive was generated by hypermail 2.1.4 : Thu Jun 01 2006 - 06:33:20 ART