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

Reply via email to