I think you can manipulate the queue size by issuing the command mls qos input priority 1 bandwidth 15
show mls qos input should have something like 3 columns with queue, 1 and 2 then underneath queue will be priority, and under 1 would be 15 On Mon, Sep 3, 2012 at 9:14 PM, Dan Quinlan (daquinla) <daqui...@cisco.com>wrote: > Threshold values are not referring to bandwidth - the refer to queue > depth (or buffers). The 3750 has buffers reserved per port and a pool of > shared buffers, hence why the value can be greater than 100%. If the > question asks to address output traffic based on bandwidth, you need to > focus on shape and share commands. If it wants you to address traffic based > on queue depth, you need to focus on thresholds. > > DQ > d...@cisco.com > > On Sep 3, 2012, at 11:36 AM, "Jason Murray" <murr...@usa.com> wrote: > > Ok so threshold is used a little differently. So yes default auto qos > config queue 1 the priority queue has a threshold of 100 percent or more. > I myself do really get the whole more than 100% but don't know if it > matters so let me give an example of how to use threshold. > > So lets say for example you are to assign COS 2, 6 and 7 to que 4. And it > also states if the link becomes 45 percent saturated then start dropping > cos 6. You need to use thresholds to accomplish this > > So first you need to assign those cos values to queue four also keeping in > mind that second requirement of dropping cos 6 once the link is 45 percent > saturated. > > mls qos srr-queue output dscp-map queue 4 threshold 3 2 7 > mls qos srr-queue output dscp-map queue 4 threshold 2 6 > > Now you notice how I split the COS values out between thresholds but they > are still assigned to queue 4. The next command will address that > > mls qos queue-set output 2 threshold 2 100 100 100 45 > > Ok lets explain this last one so "output 2" corresponds to the queue set > that is assigned to that particular port so in this case "queue set 2" > Threshold 2 matches up with the the second command so that only affects COS > 6 in queue 4 and not anything cos values assigned to queue 4. > > Now we assign those configurations to the interface by using the queue-set > command > > > int f1/0/1 > queue-set 2 > > So that's what thresholds have to do with it. > > Jason > > > > > > ----- Original Message ----- > > From: Krishna > > Sent: 09/02/12 12:00 AM > > To: murr...@usa.com, Randall Crumm, Dan Quinlan \(daquinla\) > > Subject: Re: [OSL | CCIE_Voice] LAN Qos Question > > jason, > > reg: If you leave priority que out configured along with shape of 25 > percent then essentially que 1 can have 100 percent of the bandwidth if > needs it. > > Isn't it queue 1 takes whatever the value defined in the threshold i.e. > for example mls qos queue-set output 1 threshold 1 138 138 92 138, this > takes queue 1 to 138%, and once it is over it comes back to share mode, > since the priority queue overwritten the shape, and left over is share > value whatever defined at the interface level... please correct me if i m > wrong.. > > thank you > krishna. > > ------------------------------ > *From:* "murr...@usa.com" <murr...@usa.com> > *To:* murr...@usa.com; Randall Crumm <rrcr...@yahoo.com>; Dan Quinlan > (daquinla) <daqui...@cisco.com> > *Cc:* ccie_voice@onlinestudylist.com > *Sent:* Saturday, September 1, 2012 8:20 PM > *Subject:* Re: [OSL | CCIE_Voice] LAN Qos Question > > > > > > Priority goes in this order > > > > Priority queue out > > Shape > > Share > > > > If lets say for example you want cos 5 to be in the priority queue but > it also states that cos 5 should have no more than 25 percent of the > bandwidth. Of course in the mappings you need to put cos 5 in que 1. Then > you need to disable priority que out and use shape to give cos 5 only 25 > percent (shape 4 0 0 0). If you leave priority que out configured along > with shape of 25 percent then essentially que 1 can have 100 percent of the > bandwidth if needs it. Make sure you read the question carefully to see > what it is wanting. > > > > Jason > > > > > > > > > > > > On 9/1/12 at 10:56 AM, Randall Crumm wrote: > > > > > Hi, > > > I have a question about LAN QoS. > > > > > > If I do shape and share on an interface do I have to disable priority > queue out on the interface? > > > > > > > > > > > > Cheers, > > > Randall > > _______________________________________________ > 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://www.platinumplacement.com/> > > > > > > > _______________________________________________ > 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 >
_______________________________________________ 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
