Note:

• handle ffff: is a reserved handle for ingress and parent ffff: refers to the ingress qdisc.
• root refers to the egress qdisc.
• police is used to enforce rate limits.
• htb is a hierarchical token bucket used for shaping.
• flowid assigns traffic to a specific class.
• tc class is only for egress qdisc, not ingress qdisc
• lowid :1 in this ingress command is a label or tag used for accounting and statistics: tc filter add dev <interface> parent ffff: protocol ip prio 1 u32 match ip src 0.0.0.0/0 police rate 1mbit burst 10k drop flowid :1

Queue 1 ─┐
Queue 2 ─┘→ Scheduler 1 → Scheduler 2 → Root Egress Qdisc (eth1)

Queue 3 ─┐
Queue 4 ─┘→ Scheduler 3 → Scheduler 4 → Root Egress Qdisc (eth1)

Note:

• use tc class to create queue/scheduler structure
• use tc filter to map traffic to queue

t.sh

# Step 1: Add root HTB qdisc to eth1
tc qdisc add dev eth1 root handle 1: htb default 100
 
# Step 2: Create top-level classes (Scheduler 2 and Scheduler 4)
tc class add dev eth1 parent 1: classid 1:10 htb rate 10mbit  # Scheduler 2
tc class add dev eth1 parent 1: classid 1:20 htb rate 10mbit  # Scheduler 4
 
# Step 3: Create second-level classes (Scheduler 1 and Scheduler 3)
tc class add dev eth1 parent 1:10 classid 1:11 htb rate 5mbit  # Scheduler 1
tc class add dev eth1 parent 1:20 classid 1:21 htb rate 5mbit  # Scheduler 3
 
# Step 4: Create leaf classes (Queues)
tc class add dev eth1 parent 1:11 classid 1:111 htb rate 2mbit  # Queue 1
tc class add dev eth1 parent 1:11 classid 1:112 htb rate 3mbit  # Queue 2
 
tc class add dev eth1 parent 1:21 classid 1:211 htb rate 2mbit  # Queue 3
tc class add dev eth1 parent 1:21 classid 1:212 htb rate 3mbit  # Queue 4
 
# Step 5: Attach filters to classify traffic into queues
# You can change IPs or match conditions as needed
 
# Queue 1: traffic from 192.168.1.1
tc filter add dev eth1 protocol ip parent 1: prio 1 u32 \
    match ip src 192.168.1.1/32 flowid 1:111
 
# Queue 2: traffic from 192.168.1.2
tc filter add dev eth1 protocol ip parent 1: prio 1 u32 \
    match ip src 192.168.1.2/32 flowid 1:112
 
# Queue 3: traffic from 192.168.1.3
tc filter add dev eth1 protocol ip parent 1: prio 1 u32 \
    match ip src 192.168.1.3/32 flowid 1:211
# Queue 4: traffic from 192.168.1.4
tc filter add dev eth1 protocol ip parent 1: prio 1 u32 \
    match ip src 192.168.1.4/32 flowid 1:212

Delete filter example:

• filter del dev eth1 protocol ip parent 1: prio 1

Delete class example:

• tc class del dev eth1 classid 1:111 # Queue 1
• tc class del dev eth1 classid 1:112 # Queue 2
• tc class del dev eth1 classid 1:211 # Queue 3
• tc class del dev eth1 classid 1:212 # Queue 4
• tc class del dev eth1 classid 1:11 # Scheduler 1
• tc class del dev eth1 classid 1:21 # Scheduler 3
• tc class del dev eth1 classid 1:10 # Scheduler 2
• tc class del dev eth1 classid 1:20 # Scheduler 4

Delete qdisc example:

• tc qdisc del dev eth1 root