I am using Shibby's v1.28.0000 MIPSR2-109 K26 USB AIO-64K (Asus RT-N66u)
100 Mbit line.
With QOS enabled (and only a few rules added myself), I cannot connect to the Tomato admin pages, as soon as I have a Usenet DL running. NNTP is in a QOS rule and it is throttled, but it doesn't matter, if I limit it to 80, 50 or even 30%. I still can't connect while downloading.
I can also not connect via SSH, as long as the download is active. As soon as it is finished, all access is possible again.
It seems that the router is quite busy with this QOS rule and I wonder if this is normal. I would assume that one should always be able to connect…
Any help/suggestion about finding out the source of the clog would be great.