FVS336G Firmware Version: 3.0.3-17

The original poster sounds like he has more of an issue of 90% degradation. I'm sure these routers are performing as best they can with the firmware they have ( not saying the firmware or hardware may not have a flaw or two or issues). Have you considered the factor of more link aggregation. even your ISPs equipment has a theoretical limit of the switching power it can perform at any given time. My office firewall has a white sheet stating that I will get a 5Gbps throughput. Do I fully ever expect to see it even if I had the service to run at that speed. Absolutely not. Distance, location, line quality, environment, firewall rules, port redirects all come in to effect on what kind of performance you can expect to see. To both posters, If you are running a Vanilla config, then I would try downgrading your firmware for testing if possible ( I know the OP is 300 miles away which makes it harder). I also suggest if you have a guaranteed SLA, that you contact your ISP to start troubleshooting the issue. On a 200Mb or even a 60Mb, I wouldn't be running a Netgear 336G. I run one at home on my 30Mb and I do have rules setup and the area has grown in the past two years and I consistently see 20Mb average. I'm running at 66% of what they sold me, but its to be expected. To JRPSupport, you are getting 3-6% and you may have to consider changing hardware /and or vendor. You could upgrade as Adit suggested, or downgrade and see if that has helped. You could enable WAN-LAN dropped packet logging to see if your firewall is dropping them for some reason. Hope this bit helped