Hi Richard!
It is. This is the output from the lscfg -vl ent1:

DEVICE  LOCATION        DESCRIPTION

ent1            20-58           Gigabit Ethernet-SX PCI Adapter
                                (14100401)

        Network Address.............0004AC7C935F
        Displayable Message.........Gigabit Ethernet-SX PCI Adapter
                                (14100401)
        EC Level....................E78971
        Part Number.................41L6396
        FRU Number..................07L8918
        Device Specific.(YL)........P2-I1/E1

And this is the output from lsattr -R -l ent1 -a media_speed:

10_Half_Duplex
10_Full_Duplex
100_Half_Duplex
100_Full_Duplex
Auto_Negotiation

Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines