A simple tc command wrapper tool. Easy to setup traffic control of network bandwidth/latency/packet-loss/packet-corruption to network interfaces.
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Latest commit cb2b825 Jul 16, 2018




A Simple tc command wrapper tool. Easy to set up traffic control of network bandwidth/latency/packet loss/packet-corruption to a network interface.

Linux CI test status GitHub repository

Traffic control features

Traffic shaping target

Apply traffic shaping rules to specific targets:

  • Outgoing/Incoming packets
  • Source/Destination IP-address/network (IPv4/IPv6)
  • Source/Destination ports

Moreover, exclude from shaping rules from specific targets:

  • Source/Destination IP-address/network (IPv4/IPv6)
  • Source/Destination ports

Available parameters

The following parameters can set to network interfaces:

  • Network bandwidth rate [G/M/K bps]
  • Network latency [microseconds/milliseconds/seconds/minutes]
  • Packet loss rate [%]
  • Packet corruption rate [%]
  • Packet duplicate rate [%]
  • Packet reordering rate [%]



Set traffic control (tcset command)

tcset is a command to add traffic control rule to a network interface (device).

e.g. Set a limit on bandwidth up to 100Kbps

# tcset eth0 --rate 100Kbps

e.g. Set network latency

You can use time units (such as us/sec/min/etc.) to designate delay time.

Set 100 milliseconds network latency
# tcset eth0 --delay 100ms
Set 10 seconds network latency
# tcset eth0 --delay 10sec
Set 0.5 minutes (30 seconds) network latency
# tcset eth0 --delay 0.5min

You can also use the following units:

  • m/min/mins/minute/minutes
  • s/sec/secs/second/seconds
  • ms/msec/msecs/millisecond/milliseconds
  • us/usec/usecs/microsecond/microseconds

e.g. Set 0.1% packet loss

# tcset eth0 --loss 0.1

e.g. All of the above settings at once

# tcset eth0 --rate 100Kbps --delay 100ms --loss 0.1

e.g. Specify the IP address of traffic control

# tcset eth0 --delay 100ms --network

e.g. Specify the IP network and port of traffic control

# tcset eth0 --delay 100ms --network --port 80

Delete traffic control (tcdel command)

tcdel is a command to delete traffic shaping rules from a network interface (device).

e.g. Delete traffic control of eth0

You can delete all of the shaping rules for the eth0 with -a/--all option:

# tcdel eth0 --all

Display traffic control configurations (tcshow command)

tcshow is a command to display the current traffic control settings for network interface(s).


# tcset eth0 --delay 10 --delay-distro 2  --loss 0.01 --rate 0.25M --network --port 8080
# tcset eth0 --delay 1 --loss 0.02 --rate 500K --direction incoming
# tcshow eth0
    "eth0": {
        "outgoing": {
            "dst-network=, dst-port=8080": {
                "delay": "10.0",
                "loss": "0.01",
                "rate": "250K",
                "delay-distro": "2.0"
            "dst-network=": {}
        "incoming": {
            "dst-network=": {
                "delay": "1.0",
                "loss": "0.02",
                "rate": "500K"

For more information

More examples are available at http://tcconfig.rtfd.io/en/latest/pages/usage/index.html


Install via pip (recommended)

tcconfig can be installed from PyPI via pip (Python package manager) command.

sudo pip install tcconfig

Install in Debian/Ubuntu from a deb package

  1. wget https://github.com/thombashi/tcconfig/releases/download/<version>/tcconfig_<version>_amd64.deb
  2. dpkg -iv tcconfig_<version>_amd64.deb
$ wget https://github.com/thombashi/tcconfig/releases/download/v0.19.0/tcconfig_0.19.0_amd64.deb
$ sudo dpkg -i tcconfig_0.19.0_amd64.deb


Python 2.7+ or 3.4+

Linux packages

  • mandatory: required for tc command:
    • Ubuntu/Debian: iproute2
    • Fedora/RHEL: iproute-tc
  • optional: required to when you use --iptables option:
    • iptables

Linux kernel module

  • sch_netem

Python packages

Dependency python packages are automatically installed during tcconfig installation via pip.

Optional Python packages

  • netifaces
    • Suppress excessive error messages if this package installed

Test dependencies