The Help on QoS in RT-N66U says that the way it works is that when QoS detects that certain connection has downloaded more than threshold amount of data, it assumes that this is file download, and drops its priority:
"There are two QoS rule for the 80 port, (1) Web surf and (2) File Transfer. If the each 80 port cumulated session size under 512 KB, it may be a normal web surfing.
If the cumulated session size over 512KB, it may be a file download via 80 port.
The purpose of our default rules is to set file transfer with low priority and it would not influence the web surfing. "
I wonder, how it's supposed to work with video streaming? it's certainly much more than the threshold, so if the description above gives full picture, then the streaming will be downgraded?
In fact this appears to be exactly the case. QoS is enabled in the router, and I start watching streaming video in Windows Media Player; it buffers in the content to 100% in about 7 seconds and then plays for about 50 seconds; at which point it stops and begins to buffer in more content - and now buffering goes many times slower, so now it reaches 100% in one minute, and after that watching the video is practically impossible. If I turn QoS off, I can watch the same video even with 4x times the bandwidth without a single delay. The problem also goes away if in QoS settings I specify my upload bandwidth 5-10 times more than what I really have (i.e. 5Mb instead of real 512Kb). So I wonder, is this some kind of glitch in the firmware, or Asus developers who came up with this algorithm forgot about HTTP streaming? It does look more like a glitch because this effect with slowing down happens even when the traffic is uncontested.
"There are two QoS rule for the 80 port, (1) Web surf and (2) File Transfer. If the each 80 port cumulated session size under 512 KB, it may be a normal web surfing.
If the cumulated session size over 512KB, it may be a file download via 80 port.
The purpose of our default rules is to set file transfer with low priority and it would not influence the web surfing. "
I wonder, how it's supposed to work with video streaming? it's certainly much more than the threshold, so if the description above gives full picture, then the streaming will be downgraded?
In fact this appears to be exactly the case. QoS is enabled in the router, and I start watching streaming video in Windows Media Player; it buffers in the content to 100% in about 7 seconds and then plays for about 50 seconds; at which point it stops and begins to buffer in more content - and now buffering goes many times slower, so now it reaches 100% in one minute, and after that watching the video is practically impossible. If I turn QoS off, I can watch the same video even with 4x times the bandwidth without a single delay. The problem also goes away if in QoS settings I specify my upload bandwidth 5-10 times more than what I really have (i.e. 5Mb instead of real 512Kb). So I wonder, is this some kind of glitch in the firmware, or Asus developers who came up with this algorithm forgot about HTTP streaming? It does look more like a glitch because this effect with slowing down happens even when the traffic is uncontested.
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