1) "ndd -set /dev/qfe adv_autoneg_cap 0" will
reinitialize the interface. Your interface will
probably go offline for 3~4 seconds when it does so.
(Darren Dunham)
2) "ndd -set /dev/qfe adv_autoneg_cap 0" actually
forces the interface to reset its speed. (Martin
Hepworth)
Here is my new question: Will "ndd -set /dev/qfe
adv_autoneg_cap 1" ignore the other ndd commands
running before it? For example:
# ndd -set /dev/qfe instance 3
# ndd -set /dev/qfe adv_100fdx_cap 1
# ndd -set /dev/qfe adv_100hdx_cap 1
# ndd -set /dev/qfe adv_10fdx_cap 1
# ndd -set /dev/qfe adv_10hdx_cap 1
# ndd -set /dev/qfe adv_autoneg_cap 1
Will the last command " ndd -set /dev/qfe
adv_autoneg_cap 1" ignore all the previous ndd
commands? Will the last command "ndd -set /dev/qfe
adv_autoneg_cap 1" just go to communicate with the hub
connecting to the qfe port 3 and set the proper
parameters based on the communication with the hub?

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Answer 1 - From Darren Dunham: