I agree that it is because of 16bit of minor I'd of class which restricts it to 64K. Point is, can we use multilevel qdisc and classes to extend it to more no. of classes i.e. to more than 64K classes One scheme can be like 100: root qdisc | / | \ / | \ / | \ / | \ 100:1 100:2 100:3 child classes | | | | | | | | | 1: 2: 3: qdisc / \ / \ / \ / \ / \ 1:1 1:2 3:1 3:2 leaf classes with all qdisc and classes defined as htb. Is this correct approach? Any alternative?? Besides, in order to direct traffic to leaf classes 1:1, 1:2, 2:1, 2:2, 3:1, 3:2 .... , instead of using filters I am using ipset with skbprio and iptables map-set match rule. But even after all this it don't work. Why? What I am missing?