Just looking for some basics tips to setup QoS. I want to put an application in to my DMZ which is behind a cisco router.
The internet connection is 4MB and i want to allocate 10% for traffic going to this application. I will only be allowing access from one external IP address to this application not the entire internet.
Your CBWFQ with LLQ policy could only be applied outbound. Priority queueing is generally only used for voice and video. In your config all traffic is being priority queued which ends up being FIFO, or no QOS.
As the other posters noted, to accomplish what you desire you need to set a policy on the ISP's Internet router outputting to your 4 Mb link.
Assuming the ISP won't support this, and you really, really need to provide guaranteed bandwidth to your application. You can come close by shaping your inbound Internet traffic on your LAN facing interface between 1/4 to 1/2 of your link's bandwidth and allocating 400 Kb for your special traffic. Or, policing non-special application traffic to about 1/2 to 3/4 of your link's bandwidth.
Your policy will be ineffectual for inbound Internet traffic on your side of the Internet connection. Reason being, you're past the congestion point.
You need it on the ISP outbound (outbound to you) interface.
What I suggested was creating an artificial congestion point where you can manage the bandwidth. I also suggested placing it outbound on your LAN side, but it would also work inbound on your Internet side. It won't be as effective as your policy would be if that policy was placed on the ISP's router.
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