This weekend I noticed that internet access seemed slow. I ran speedtest a few times and was seeing speeds in the range of sub-1Mbps up to 30Mbps on downloads, and about 5Mbps up. We have 100Mbps down/10 up. I thought it was strange, but figured it must be something like interference or network congestion.
This morning it persisted, so I ran speedtest using a wired connection and got the numbers I was expecting. On the WiFi front, I plugged in an old router and its numbers matched the wired numbers on the R7000. The issues is definitely with the R7000. I've tried the following with no success:
- Change WiFi channels.
- Downgrade firmware (was running 1.0.4.30_1.1.67 and tried both 1.0.4.28_1.1.64 and 1.0.4.18_1.1.52)
- Changing router placement to a more open area.
- Experiment with different DNS settings.
Anybody experience anything like this? I noticed this morning that when I ran speedtest, there was a strange high pitched "whine" noise made by the router. When it's not doing high speed download, this noise isn't present. With the seemingly random issue, I worry that something hardware related has malfunctioned in the router - conveniently right after the warranty expired.
Weird... I re-enabled QoS (WMM on both bands and upstream QoS) and the speeds shot back up. Disabling QoS was actually the first thing I tried (forgot to mention that in the original post). Not sure what exactly fixed the problem, but seems to be good now.
