Zealous wrote: > Hi friends > I was using redhat bfore and tc was working fine > but when i migrated to slackware > my verison is slackware 8.1 > when i m giving below command. > root@xxxx:~# tc qdisc add dev eth1 > RTNETLINK answers: Invalid argument > Y it is giving me this error RTNETLINK ANSWERS: INVALID ARGUMENT ... I bet you havent insert QoS modules in your kernel, because you are using default kernel from slackware instalation disc. Please make sure QoS modules loaded first.. Regards, Rio Martin.