I'm not sure if the 75% rule applies to a strict priority queue in LLQ. If
you try to do the same but use the "bandwidth" keyword so that you're
configuring a non-priority queue, it'll certainly scream at you. However, I
was not aware you could configure the priority queue for more than the 75%
limit as I have never tried to until today. I believe Cisco recommends no
more than 33% as a general rule of thumb outside of the CCIE lab :)

max-3825-voice-lab(config)#policy-map TEST
max-3825-voice-lab(config-pmap)#class voice
max-3825-voice-lab(config-pmap-c)#priority 99000
max-3825-voice-lab(config-pmap)#class OTHER
max-3825-voice-lab(config-pmap-c)#bandwidth 99000
Insufficient bandwidth 100000 kbps for the bandwidth guarantee (99000)

max-3825-voice-lab(config-pmap-c)#bandwidth 74000
Insufficient bandwidth 100000 kbps for the bandwidth guarantee (74000)

max-3825-voice-lab(config-pmap-c)#

--
max

On Tue, Apr 9, 2013 at 5:56 PM, Fulvio allegretti
<[email protected]>wrote:

> Hi all,
> I know that the sum of reserved bandwidth on CBWFQ cannot exceed 75 % of
> the interface bandwidth, and if I try to apply a policy to an interface
> where I have reserved more than 75% I should get something like this:
>
> I/f FastEthernet0/0 class RTP requested bandwidth 9000 (kbps), available
> only 7500 (kbps)
>
> but I just can't make this message come up, for some reason I am able to
> reserve up to 99M on  100 M interface. I am sure am missing something
> simple here and just can't see the wood for trees at this time at night.
> Can you help?
>
> Thanks, Fulvio
>
> R4#sh policy-map
>   Policy Map VOIP
>     Class RTP
>       priority 99000 (kbps)
>
> R4#sh run int fa 0/0
> Building configuration...
>
> Current configuration : 145 bytes
> !
> interface FastEthernet0/0
>  ip address 150.100.40.4 255.255.255.0
>  ip ospf mtu-ignore
>  duplex auto
>  speed auto
>  service-policy output VOIP
> end
>
>
>
> R4#sh policy-map int fa 0/0
>  FastEthernet0/0
>
>   Service-policy output: VOIP
>
>     queue stats for all priority classes:
>
>       queue limit 64 packets
>       (queue depth/total drops/no-buffer drops) 0/0/0
>       (pkts output/bytes output) 0/0
>
>     Class-map: RTP (match-all)
>       0 packets, 0 bytes
>       5 minute offered rate 0 bps, drop rate 0 bps
>       Match: protocol rtp
>       Priority: 99000 kbps, burst bytes 2475000, b/w exceed drops: 0
>
>
>     Class-map: class-default (match-any)
>       77 packets, 6651 bytes
>       5 minute offered rate 0 bps, drop rate 0 bps
>       Match: any
>
>       queue limit 64 packets
>       (queue depth/total drops/no-buffer drops) 0/0/0
>       (pkts output/bytes output) 77/7624
>
>
> R4#sh int fa 0/0 | in BW
>   MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
>
>
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