Just relatively recently I've started noticing poor performance when watching Netflix on my TV. The movie would start playing, and then all of the sudden I'd get an error message that the "content requested can't be played at this time, try again later", restarting the movie works fine, but same message appears after some time. The quality of the videos seem to be also suffering, although it would play in 1080p, you could see video encoding artifacts from time to time (e.g. color blocks, etc.)
Today I noticed that browsing the web, while Netflix streaming on TV, is also lagging. Most of the sites would load, but with big lag, occasionally a site wouldn't load at all. Accessing WebAdmin is also laggy, even SSH session suffer a lagged response (when using TOP or IFTOP commands for example). As soon as I stop the playback, everything comes back to normal operation, web, SSH, WebAdmin, etc.
I also have a BD player with Netflix service (Oppo) and it has the same effect (causes lag). Streaming other sites (like YouTube) has no problem at all. So, only Netflix seems to be the issue.
I'm on the latest UTM firmware, TV and BD player are added to Web Protection exception for hosts, both are hardwired to my Cisco SG200-26 switch (not a WiFi AP problem). When looking at TOP command the CPU doesn't go above 2-3% when streaming. Nothing in the logs either (nothing that I could see at least).
When browsing internal sites, on local network, no problems. Only content that's accessed through the UTM gateway has issues when streaming. So, I don't think it's an issue with the switch.
Has anyone seen anything like this before?
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