November 2013: Update on CeroWrt

Posted on Nov 1, 2013 by Rich Brown.

Although the CeroWrt site ( has been quiet, that doesn’t mean that we haven’t been working.

The CeroWrt-Devel mailing list ( has been bubbling with lots of energy all summer and fall, and we’re getting close to a new release that we can recommend to everyone. Here’s what’s we’ve been working on:

  • Significant refinement to the CoDel code, to further knock down bufferbloat
  • Update to Linux 3.10 kernel that incorporates much of our earlier work on bufferbloat
  • All the good effort from the OpenWrt Barrier Breaker development firmware
  • And too many other improvements to mention here

You can check out any number of Bufferbloat videos at to learn more about the problem and our solutions.

If you just want good router firmware, purchase a Netgear WNDR3800 and burn the current 3.7.5-2 firmware. You can also follow our activity on the CeroWrt-devel list to see what’s happening and learn when experimental builds or solid new releases are available.

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Comcast Research Innovation Fund
Nlnet Foundation
Shuttleworth Foundation

Bufferbloat Related Projects

Congestion Control Blog
Lede Project (OpenWrt)
Flent Network Test Suite
The Cake shaper

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".