Hierarchical Token Bucket

例子一:

# tc qdisc add dev eth0 root handle 1: htb default 30
 
# tc class add dev eth0 parent 1: classid 1:1 htb rate 6mbit burst 15k
 
# tc class add dev eth0 parent 1:1 classid 1:10 htb rate 5mbit burst 15k
# tc class add dev eth0 parent 1:1 classid 1:20 htb rate 3mbit ceil 6mbit burst 15k
# tc class add dev eth0 parent 1:1 classid 1:30 htb rate 1kbit ceil 6mbit burst 15k

The author then recommends SFQ for beneath these classes:

# tc qdisc add dev eth0 parent 1:10 handle 10: sfq perturb 10
# tc qdisc add dev eth0 parent 1:20 handle 20: sfq perturb 10
# tc qdisc add dev eth0 parent 1:30 handle 30: sfq perturb 10

Add the filters which direct traffic to the right classes:

# U32="tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32"
# $U32 match ip dport 80 0xffff flowid 1:10
# $U32 match ip sport 25 0xffff flowid 1:20 

同一个root class下的子类可以相互借流量，如果直接不在qdisc下面创建一个root，而是直接创建三个class，他们之间是不能相互借流量的。

例子二:

tc qdisc add dev eth0 root handle 1: htb default 12

• This command attaches queue discipline HTB to eth0 and gives it the "handle" 1:.
• This is just a name or identifier with which to refer to it below.
• The default 12 means that any traffic that is not otherwise classified will be assigned to class 1:12.

tc class add dev eth0 parent 1: classid 1:1 htb rate 100kbps ceil 100kbps
tc class add dev eth0 parent 1:1 classid 1:10 htb rate 30kbps ceil 100kbps

tc class add dev eth0 parent 1:1 classid 1:11 htb rate 10kbps ceil 100kbps

tc class add dev eth0 parent 1:1 classid 1:12 htb rate 60kbps ceil 100kbps

The first line creates a "root" class, 1:1 under the qdisc 1:. The
definition of a root class is one with the htb qdisc as its parent.

同一个root class下的子类可以相互借流量，如果直接不在qdisc下面创建一个root，而是直接创建三个class，他们之间是不能相互借流量的。

tc qdisc add dev eth0 parent 1:10 handle 20: pfifo limit 5
tc qdisc add dev eth0 parent 1:11 handle 30: pfifo limit 5
tc qdisc add dev eth0 parent 1:12 handle 40: sfq perturb 10

tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip src 1.2.3.4 match ip dport 80 0xffff flowid 1:10
tc filter add dev eth0 protocol ip parent 1:0 prio 1 u32 match ip src 1.2.3.4 flowid 1:11