Help: Simple Socket Server - Stratix IV GX

1-is the FPGA connected to a switch or directly to your pc?

2-if it s connected to a switch, ask your admin to give you a mac address related to a IP/DHCP, he will it give to you.

3- GO Qsys and disable PCS options in tse, since you re using an external phy

4- For mac address in software, this example assumes you have this info in an external flash, but you can override it with this (network_utilities.c):

error_t get_board_mac_addr(unsigned char mac_addr)
{
    error_t error = 0;
    alt_u32 signature;
    mac_addr = 0x00;
    mac_addr = 0x07;
    mac_addr = 0xED;
    mac_addr = 0xFF;
    mac_addr = 0x0C;
    mac_addr = 0x83;
    		return error;
}

replace with mac address you get from your sys admin.

the problem should be resolved then