I am not sure....but have u compiled everything in QoS as modules ? If so you might need to first load those modules. Best solution would be to compile HTB into the kernel. Regards, Amit On Mon, 10 Dec 2001, yangrunhua wrote: > # insmod sch_htb.o > sch_htb.o: unresolved symbol qdisc_get_rtab > sch_htb.o: unresolved symbol __rta_fill > sch_htb.o: unresolved symbol unregister_qdisc > sch_htb.o: unresolved symbol qdisc_put_rtab > sch_htb.o: unresolved symbol register_qdisc > sch_htb.o: unresolved symbol pfifo_qdisc_ops > sch_htb.o: unresolved symbol rtattr_parse > sch_htb.o: unresolved symbol qdisc_kill_estimator > but I can see all this symbols in my /boot/System.map why? -- The statement below is true. The statement above is false. ^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^ Amit Kucheria EECS Grad. Research Assistant University of Kansas @ Lawrence (R)+1-(785)-830 8521 ||| (O)+1-(785)-864 7774 ____________________________________________________