Unter linux könnte man das nachschauen mit
$ sudo ethtool –show-eee eth0
EEE settings for eth0:
EEE status: enabled - active
Tx LPI: disabled
Supported EEE link modes: 100baseT/Full
1000baseT/Full
Advertised EEE link modes: 100baseT/Full
1000baseT/Full
Link partner advertised EEE link modes: 100baseT/Full
1000baseT/Full
Habe aber keine IB4 😁