I have been trying to get help with the B/W limiter over in thread http://tomatousb.org/forum/t-350861/build-7467-bandwidth-limiter-problem.
Just now, I accidentally discovered that the B/W limiter indeed has no effect UNLESS QOS IS ALSO ENABLED. I suspect this may not be Working As Designed, but who am I to second-guess. I can do what I want to do with the great Toastman firmware now.
I have a week-old RT-N16 running Tomato Firmware v1.28.7467 MIPSR2-Toastman K26 USB Ext. For almost all of that time I have been struggling to get the B/W limiter to work. Finally gave up and started tuning QoS. By enabling/disabling B/W limiter and QoS all 4 ways, I proved to myself that the B/W limiter only has an effect if QoS is enabled.
I would appreciate if somebody else could verify this and post to either this or the other thread. Perhaps this could be considered a bug, or described in the readme?