HI Max, Yes it applies to LLQ and I did test with bandwidth, same result. Notice that you are not getting the 75% bandwidth message, you are getting a message saying that you are trying to assing 198M on a 100M interface, I get that message as well. According to theory you should get the 75% message when you try to reserve more than that, so in your example below, if you don't reserve anything for the class OTHER you should get an error when you apply it to the interface, which make sense as until you apply it you don't know what interface you are referring to and therefore how much bandwidt is available to you. I assume in your case that you highest interface speed is 100M and the router is aware of that, if you had a 1 G interface on your router you wouldn't see the message you're seeing, but you could stll apply that policy to a fast ethernet and if you did it that's when you should get the message and the threshold is 75% according to Cisco documentation, or at least that's my un derstanding. Also, the bandwidth we are referring to here can be changed with the bandwidth command on the interface, so you can test by making a fast ethernet 10 M and assinging 8M for example. But I don't get the 75% message and it allows me to reserve more than 75%. I'll test with a Serial today. Fulvio
Date: Tue, 9 Apr 2013 20:33:29 -0500 Subject: Re: [OSL | CCIE_RS] CBWFQ Bandwidth Allocation From: [email protected] To: [email protected] CC: [email protected] 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 TESTmax-3825-voice-lab(config-pmap)#class voicemax-3825-voice-lab(config-pmap-c)#priority 99000max-3825-voice-lab(config-pmap)#class OTHER max-3825-voice-lab(config-pmap-c)#bandwidth 99000Insufficient 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, _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
