I am looking to create a QoS policy on a Cat 4500 which will limit traffic leaving a fastethernet port to 20Mb/s. Based on this 20Mb/s I then want to apply a shape percentage to each of the 4 tx queues and transmit tcertain traffic in each queue. I would like to match traffic from a subnet elsewhere in my network and put it in a tx queue with, for example, 25% of the rate I limit the interface to.
Am I able to shape the interface to 20Mb/s and base percentage values on this 20Mb/s for each tx queue ?
which is about shaping each queue to a specified rate.
As far as I know there is no nested policy, which will allow you to specify a rate for the interface and percentages for each queue based on the rate. Rather you can specify a limit per queue and as long as the sum of those rates is 20 Mb you should get the desired result.
I had read the first 2 links you posted. I was really interested in nesting policies with percentages based on an interface value which doesn't seem possible. This was to save me re-adjusting each queue's alloacted bandwidth when I increase the overall link bandwidth. For instance I have a fastethernet port going at 10Mb/s. I was hoping to use percentages of that such that if I open the link up to be able to transmit 20Mb/s then the percentages increase the queue sizes proportionately. The reason I am limiting the fastethernet port is that the transmission network it connects into only allocates 10Mb/s now and soon to be 20Mb/s.
I will just have to re-config each tx queue when the bandwidth increases.
We are pleased to announce availability of Beta software for 16.6.3.
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