Mii tool flow control

Active Oldest Votes. You could use mii-tool to verify your current settings or to change them. Improve this answer. Huygens Huygens 5 5 silver badges 12 12 bronze badges. Are you sure flow-control is actually working? I enabled flow control on the x86 host side, on both switch ports and I ran mii-tool as you suggested above. Packet captures on the x86 side pause frames being generated by the switch NIC but I see nothing on a capture on the RPi side.

I realize capturing pause frames can be tricky as per serverfault. Of course the flooding only happen from the faster NIC, and I can see on the switch that pause frames are being sent to the faster NIC but I don't see them in Wireshark. At least I can see that flow control is working on half of the connection.

I would need to find a slower device than the Pi to test, I'm afraid I don't one around. Perhaps the right way to test it would be to remove the switch from the equation, connecting the Pi directly to the host? Yes that would be the right way, or by using a dumb switch. But I'm afraid you will have to try that out for yourself. I don't have performance problem which would require me to investigate the use of flow control. So flow control is disable on each port of my switch and the Linux TCP flow control algo is doing a good job for me.

Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. You can find the link state speed of connectivity. In this tutorial we learned how to use the Linux mii tool to check and change the network interface parameters. Thank you for reading and please leave your suggestion in the comment section below. This website uses cookies so that we can provide you with the best user experience possible.

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Since this is a bit Linux specific, I added a Linux tag — wzzrd. Add a comment. Active Oldest Votes. Improve this answer. The interface is a Broadcom.

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