I recently upgraded to Cox ultimate internet (150/20). When doing a speed test, I get my advertised speeds, and don't have any issues. I am using a Motorola SB6183. My lowest downstream power level is -16 dBmV. All four upstream channels are either 53 or 54 dBmV.
My issue occurs when I use Amazon's cloud drive application to upload data to their servers. The application is able to utilize my entire upload bandwidth, and transfer at over 20mbps. There is a problem though. My latency gets out of control. If I upload something else in conjunction with running the cloud drive application, my latency to various different sites goes to 1500ms or even higher.
That's not even the real problem, though. After a specified period (seems to be around 10 minutes) my connection just stops. I can still access the cable modem's interface but nothing past that. The only way at this point to restore my connection is to power cycle the modem.
I do have a slightly unique router, it is pFsense running on a VMware ESXi host. It has been completely stable for over 6 months until I had this upgrade to Cox ultimate (I had premiere before).
I realize that the latency issue is likely due to no Qos setup in my router (I don't have the CPU cycles available), but the disconnections I do not understand. If I use the Amazon cloud drive application on a VM guest running on the same ESXi host as my router, I can only get ~11mbps upload speeds, which is likely due to CPU hardware limitations.
Any ideas on what could be causing this? More importantly, is this an issue on my end or Cox's?
I've attached a url of my modem's signal levels below in case something is out of the ordinary there.
http://i.imgur.com/Po6Eoo1.jpg
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