我用的是实验室买的altera Stratix II EP2S180开发板，在niso ii ide v6.0中运行simple socket server时编译都通过了，可是下载的时候遇到问题，Console中提示如下：

Simple Socket Server starting up
Not an Altera Nios Development Board.
:
You need to modify the function get_mac_addr
:
to set a MAC address for your board:

[lwIP]: See STDERR for expanded diagnosis translation.
[lwIP]: [init_done_func] Fatal: lwip_devices_init failed, perhaps ethernet inter
face.
[lwIP]: ERRNO: :

[lwIP]: See STDERR (FAULT_LEVEL is SYSTEM).
[lwIP]: FAULT_LEVEL is SYSTEM.
[lwIP]: FATAL Error, Restart required.
[lwIP]: Locking scheduler - endless loop.

自己随便设置了一个MAC 地址后还是有问题：

lwIP]: See STDERR for expanded diagnosis translation.
[lwIP]: [init_done_func] Fatal: lwip_devices_init failed, perhaps ethernet inter
face.
[lwIP]: ERRNO: :

[lwIP]: See STDERR (FAULT_LEVEL is SYSTEM).
[lwIP]: FAULT_LEVEL is SYSTEM.
[lwIP]: FATAL Error, Restart required.
[lwIP]: Locking scheduler - endless loop.

不知问题出在哪一方面？请知道的能告诉小弟，在这拜谢了！