There is no bandwidth control option in c6 and later on. I have used it in my Archer c20 it was very useful because sometimes we have to give wifi access even we don't want to so in that case we could capped their bandwidth so much low that my devices won't hamper but his will and he can't complain about that because he don't know. That's why this option was so useful to us but now it has replace by qos which is good but we need bandwidth control so much. For this many people like me won't switch to further TP-Link router 😓.