Hello! I created script for traffic shaping. After run, there are many overlimits and requeues in tc stat for htb root discipline. Is this normal or something going wrong? Here is script: #!/bin/sh ### BEGIN INIT INFO # Provides: trafficshaper # Required-Start: $network $syslog # Required-Stop: $network $syslog # Should-Start: # Should-Stop: # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: Start and stop trafficshaper # Description: trafficshaper ### END INIT INFO PATH=/sbin:/bin:/usr/bin . /lib/init/vars.sh . /lib/lsb/init-functions # Reads config file (will override defaults above) [ -r /etc/default/trafficshaper ] && . /etc/default/trafficshaper # Devices calculation devDL=$dev devUL=ifb0 # Flush discuiplines for DL and UL devices delete_qdisc () { tc qdisc del dev $devDL ingress 2>/dev/null tc qdisc del dev $devUL root 2>/dev/null tc qdisc del dev $devDL root 2>/dev/null } case "$1" in start|"") log_daemon_msg "Starting trafficshaper" "ok" # Global constants divisor=2048 quantum=1514 perturb=10 reNum="\([0-9]*\)[a-zA-Z]*" reStr="[0-9]*\([a-zA-Z]*\)" # Bandwidth calculation bwPrivateDL=`expr \( $bwDL : $reNum \) / 2``expr $bwDL : $reStr` bwPublicDL=$bwPrivateDL bwPrivateUL=`expr \( $bwUL : $reNum \) / 2``expr $bwUL : $reStr` bwPublicUL=$bwPrivateUL # Delete discuiplines for DL and UL devices delete_qdisc ifconfig $devUL txqueuelen 1000 2>/dev/null ifconfig $devUL up 2>/dev/null # Add discuiplines for DL device tc qdisc add dev $devDL root handle 1: htb default 12 # Add classes for DL device tc class add dev $devDL parent 1: classid 1:1 htb rate $bwDL ceil $bwDL quantum $quantum tc class add dev $devDL parent 1:1 classid 1:11 htb prio 1 rate $bwPrivateDL ceil $bwDL quantum $quantum tc class add dev $devDL parent 1:1 classid 1:12 htb prio 2 rate $bwPublicDL ceil $bwPublicDL quantum $quantum tc qdisc add dev $devDL parent 1:11 handle 11: sfq divisor $divisor perturb $perturb tc qdisc add dev $devDL parent 1:12 handle 12: sfq divisor $divisor perturb $perturb tc filter add dev $devDL protocol all prio 1 parent 11: handle 11 flow hash keys dst divisor $divisor baseclass 1:11 tc filter add dev $devDL protocol all prio 2 parent 12: handle 12 flow hash keys dst divisor $divisor baseclass 1:12 # Add filters for DL device if [ -s $filePrivate ]; then for ip in `grep -v "#" $filePrivate`; do if [ `expr index $ip :` = 0 ]; then tc filter add dev $devDL protocol all prio 1 parent 1: u32 match ip dst $ip flowid 1:11 else echo $ip tc filter add dev $devDL protocol all prio 1 parent 1: u32 match ip6 dst $ip flowid 1:11 fi done fi tc filter add dev $devDL protocol all prio 2 parent 1: u32 match ip dst 0/0 flowid 1:12 tc filter add dev $devDL protocol all prio 2 parent 1: u32 match ip6 dst ::/0 flowid 1:12 # Add discuiplines for UL device tc qdisc add dev $devUL root handle 2: htb default 22 # Add classes for UL device tc class add dev $devUL parent 2: classid 2:2 htb rate $bwUL ceil $bwUL quantum $quantum tc class add dev $devUL parent 2:2 classid 2:21 htb prio 1 rate $bwPrivateUL ceil $bwUL quantum $quantum tc class add dev $devUL parent 2:2 classid 2:22 htb prio 2 rate $bwPublicUL ceil $bwPublicUL quantum $quantum tc qdisc add dev $devUL parent 2:21 handle 21: sfq divisor $divisor perturb $perturb tc qdisc add dev $devUL parent 2:22 handle 22: sfq divisor $divisor perturb $perturb tc filter add dev $devUL protocol all prio 1 parent 21: handle 21 flow hash keys src divisor $divisor baseclass 2:21 tc filter add dev $devUL protocol all prio 2 parent 22: handle 22 flow hash keys src divisor $divisor baseclass 2:22 # Add filters for UL device if [ -s $filePrivate ]; then for ip in `grep -v "#" $filePrivate`; do if [ `expr index $ip :` = 0 ]; then tc filter add dev $devUL protocol all prio 1 parent 2: u32 match ip src $ip flowid 2:21 else tc filter add dev $devUL protocol all prio 1 parent 2: u32 match ip6 src $ip flowid 2:21 fi done fi tc filter add dev $devUL protocol all prio 2 parent 2: u32 match ip src 0/0 flowid 2:22 tc filter add dev $devUL protocol all prio 2 parent 2: u32 match ip6 src ::/0 flowid 2:22 # Add mirred redirect discuiplines for UL device tc qdisc add dev $devDL ingress tc filter add dev $devDL parent ffff: protocol all u32 match u32 0 0 action mirred egress redirect dev $devUL log_end_msg 0 ;; stop) log_daemon_msg "Stopping trafficshaper" "ok" # Delete discuiplines for DL and UL devices delete_qdisc log_end_msg 0 ;; restart|force-reload) $0 stop $0 start ;; *) echo "Usage: trafficshaper [start|stop|restart|force-reload]" >&2 exit 3 ;; esac : And there is tc show output: # tc -s qdisc show dev eth0 qdisc htb 1: root refcnt 6 r2q 10 default 12 direct_packets_stat 5 direct_qlen 1000 Sent 147698795 bytes 958679 pkt (dropped 0, overlimits 43066 requeues 148) backlog 0b 0p requeues 148 qdisc sfq 11: parent 1:11 limit 127p quantum 1514b depth 127 divisor 2048 perturb 10sec Sent 81156975 bytes 527521 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 qdisc sfq 12: parent 1:12 limit 127p quantum 1514b depth 127 divisor 2048 perturb 10sec Sent 66541452 bytes 431152 pkt (dropped 0, overlimits 0 requeues 0) backlog 0b 0p requeues 0 qdisc ingress ffff: parent ffff:fff1 ---------------- Sent 2333918666 bytes 1999165 pkt (dropped 421, overlimits 0 requeues 0) backlog 0b 0p requeues 0 # tc -s class show dev eth0 class htb 1:11 parent 1:1 leaf 11: prio 1 rate 30000Kbit ceil 60000Kbit burst 1593b cburst 1590b Sent 82530637 bytes 547960 pkt (dropped 0, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 lended: 521119 borrowed: 5867 giants: 0 tokens: 6097 ctokens: 3048 class htb 1:1 root rate 60000Kbit ceil 60000Kbit burst 1590b cburst 1590b Sent 150027823 bytes 987451 pkt (dropped 0, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 lended: 5867 borrowed: 0 giants: 0 tokens: 3215 ctokens: 3215 class htb 1:12 parent 1:1 leaf 12: prio 2 rate 30000Kbit ceil 30000Kbit burst 1593b cburst 1593b Sent 67497186 bytes 439491 pkt (dropped 0, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 lended: 437399 borrowed: 0 giants: 0 tokens: 6431 ctokens: 6431 Is my script correct or I'm something missing? 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