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Question for ethtool experts - Pause frames
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Daniel Lemus
Feb 3, 2012, 1:08:15 AM2/3/12
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How does ethtool configure pause frames? Documentation shows that -A
is used to change the pause frames as in "ethtool -A eth0 rx on".
However, turning autonegotiation on or off is also an option when
using -A. As far as I know, autonegotiation has little to do with
pause frames. This gives me doubts about whether ethtool -A allows me
to send a pause frame which halts the transmission of the sender.
(Also, it appears to be a requirement to turn autonegotiate off to
even be able to turn RX and TX off.)
One other doubt I have about this being the way to turn pause frames
on or off is the lack of options such as the pause time requested when
using pause frames.
So my question is, does using "ethtool -A eth0 rx on" really turn
pause frames on?
Also, is there a way to configure pause frames programmatically, such
as with C code?
Thank you.
is used to change the pause frames as in "ethtool -A eth0 rx on".
However, turning autonegotiation on or off is also an option when
using -A. As far as I know, autonegotiation has little to do with
pause frames. This gives me doubts about whether ethtool -A allows me
to send a pause frame which halts the transmission of the sender.
(Also, it appears to be a requirement to turn autonegotiate off to
even be able to turn RX and TX off.)
One other doubt I have about this being the way to turn pause frames
on or off is the lack of options such as the pause time requested when
using pause frames.
So my question is, does using "ethtool -A eth0 rx on" really turn
pause frames on?
Also, is there a way to configure pause frames programmatically, such
as with C code?
Thank you.
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