Dears I got # tc qdisc add dev eth0 root handle 1: htb default FFFF r2q 1 Unknown qdisc "htb", hence option "default" is unparsable "grep"ing the kernel map file System.map I can see the htb routines since I compile HTP support hard-wired. # grep htb /boot/System.map c01daa10 T htb_hash c01daa30 T htb_find c01daa80 T htb_classify c01dabb0 T htb_debug_dump c01daee0 T htb_add_to_id_tree ... I am using: Slackware 9.0 w/ kernel 2.4.20 iproute2-2.4.7-now-ss020116-try [*] QoS and/or fair queueing <*> CBQ packet scheduler <*> HTB packet scheduler <*> SFQ queue [*] QoS support [*] Rate estimator ... Is there any other option I must set to make it work? Ethy H. Brito /"\ InterNexo Ltda. \ / CAMPANHA DA FITA ASCII - CONTRA MAIL HTML (012) 3941-6860 X ASCII RIBBON CAMPAIGN - AGAINST HTML MAIL Sao Jose dos Campos / \