I want to use the AUI port of a Realtek 8029 nic.
The card is recognised by the kernel as follows:

ne2 at pci0 dev 11 function 0: RealTek 8029 Ethernet
ne2: 10base2, 10baseT, 10baseT-FDX, auto, default auto
ne2: Ethernet address 00:00:e8:d9:b8:b5
ne2: interrupting at irq 12

I tried all three connectors, only BNC works (TP, AUI not). 

Changing the media type
    ifconfig ne2 media AUI
gives
    ifconfig: SIOCSIFMEDIA: Device not configured

Is there a trick to use the AUI port ?

Best regards
Uwe