how to make a PCI net card work on ICECUBE ?

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Thanks for your help.

I found out that the ICECUBE board could tftpboot via the PCI netcard if wire net to the card, but the board could not mount NFS via the card.

So i set the environment ethact to i82559#0 and saveenv , but the board still could not mount NFS via the card.During the booting-up ,there was nothing about eth1 shown .

And i wired net to the FEC ethernet port,reset the board,found that the environment ethact was now FEC ETHERNET,so i set it again to i82559#0 and saveenv,booted up the kernel, there was nothing about eth1 shown , i tried ifconfig eth1 * up ,information were below: 

bash-2.05b# ifconfig eth1 198.87.102.218 up
SIOCSIFADDR: No such device
eth1: unknown interface: No such device
eth1: unknown interface: No such device 

where did i make mistakes ?

Best Regards

xiayu