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Forum Discussion
XR500 bandwidth reduction with QoS enabled
Hello,
I have an XR500 at the latest firmware version (2.3.2.40). I noticed that when I have QoS enabled, my download and upload speeds are slightly lower than normal. I have a fiber connection...
This is mostly called overhead with QoS. When enabled there will be a small portion of QoS that will show a bit lower speeds. If your getting to speeds with QoS disabled and just under with it enabled, then QoS is working correctly.
Thanks for the input. After performing further testing, I realized the download and upload bandwidth set under the anti-bufferbloat options actually dictates how much bandwidth the router allows, even before the anti-bufferbloat settings are taken into consideration. If I list it as 200/50, for example, my speedtest reflects just slightly under those numbers. If I list it as 500/125 (what I'm rated for by my ISP but I don't actually get these speeds even when directly connected to the fiber ONT), I get the same 480/118ish numbers as when QoS is disabled.
Good job for finding the solution. đ
One thing I should mention for anyone who might find this through google at some point - Make sure that if you're setting your bandwidth speeds over your speed test results to allow the router to give you your full bandwidth that you take this into account when setting the thresholds for anti-bufferbloat so that you're leaving enough wiggle room for priority devices.
:smileywink: