I have a 10Mbps down and 1Mbps up cable circuit with Cisco 851 router. Only QOS available is WFQ. That is fine if I can make a vonage call be stable during an ftp download. Class based Fair Queuing should work, but WFQ should at least limit ftp. I've read this only helps with slower serial links. I want to apply it to the ethernet interface connected to the cable modem. Will this work? What options for congestive discard threshold and dynamic queues do I need for a 1Mbps upload circuit?
I'm don't know the 851 QoS features, but unless there's some shaper to match your 1 Mbps up, WFQ alone won't help you if the router "sees" the interface as 10 or 100 Mbps.