Using the testlab

Cluster control

Experiment - thrash the network hard

Here’s a simple way to get all the routers sending lots of data at the same time.

On io, run

iperf -s

On io, run

pdsh -lroot -grouters 'iperf -t 60 -c'

Boom, all the routers will start running iperf simultaneously. You can, after setting your routing,
set up various tests of QoS, or different TCP/ip stacks, or changing your window size,
slam the whole system while doing other things, and capture the results with tshark or wireshark.

For example this will test a larger cwin:

pdsh -lroot -grouters 'iperf -w 1M -t 60 -c'

which was the subject of Experiment - QoS, which has many more examples


To edit this page, submit a pull request to the Github repository.
RSS feed

Recent Updates

Apr 12, 2024 Wiki page
What Can I Do About Bufferbloat?
Dec 3, 2022 Wiki page
Codel Wiki
Jun 11, 2022 Wiki page
More about Bufferbloat
Jun 11, 2022 Wiki page
Tests for Bufferbloat
Dec 7, 2021 Wiki page
Getting SQM Running Right

Find us elsewhere

Bufferbloat Mailing Lists
#bufferbloat on Twitter
Google+ group
Archived Bufferbloat pages from the Wayback Machine


Comcast Research Innovation Fund
Nlnet Foundation
Shuttleworth Foundation

Bufferbloat Related Projects

OpenWrt Project
Congestion Control Blog
Flent Network Test Suite
The Cake shaper
CeroWrt (where it all started)

Network Performance Related Resources

Jim Gettys' Blog - The chairman of the Fjord
Toke's Blog - Karlstad University's work on bloat
Voip Users Conference - Weekly Videoconference mostly about voip
Candelatech - A wifi testing company that "gets it".