FAQ

• Something does not work
• A ping between any two host pairs works well but using iperf i observe very low data rates
• maxinet_plot.py creates shifted output

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Something does not work

See Debugging-MaxiNet

A ping between any two host pairs works well but using iperf i observe very low data rates

Check the MTU of your physical interfaces. In the default configuration, MaxiNet requires the network to handle Ethernet packets with at least 1600 bytes. If your network is not able to handle these packets you can instruct MaxiNet to work around this by setting runWith1500MTU = True in your MaxiNet config file.
In addition you should check if your network card has TSO enabled (TCP segmentation offloading). You can check that with ethtool -k <interface> and disable TSO with ethtool -K <interface> tso off.

maxinet_plot.py creates shifted output

This happens when the clocks of the different workers drift apart. Sync your worker clocks via e.g. ntpdate time1.upb.de