Hi Bert, > > Dec 13 09:33:25 mail kernel: HTB delay 224640 > 5sec > > Try a newer HTB patch, it fixes this problem. what is newer? I'm currently experiencing the same problem on a SMP box, kernel 2.4.13 patched with the 39085 bytes htb_2.4.14.diff, HZ set to 1024. tc qdisc add dev eth0 root handle 1: htb default 3 tc class add dev eth0 parent 1: classid 1:1 htb rate 10Mbit burst 10kB tc qdisc add dev eth0 parent 1:1 sfq perturb 10 tc class add dev eth0 parent 1: classid 1:3 htb rate 90Mbit burst 90kB Whenever the overlimit for 1:1 kicks in, "HTB delay > 5sec" messages appear and traffic stalls immediately. Any ideas? Thanks, Stefan