Hi, I tried using under a htb qdisc u32 filter for 1 class , and fw classifier for another but i get "RTNETLINK answers: Invalid argument" when i wanr ro insert the second type of classifier. Using either u32 alone or fw alone work, so can't be a kernel or tc problem ( 2.4.21-ac1, tc with htb patch). Looks like isn't allowed to mix different classifiers under the same qdisc , but i didn't find any reference to this in the man pages, or in the howto. Can somebody confirm this behaviour and/or explain? Thanks -- Marton Sandor - sanyi@xxxxxxxxxxxx