| 是不是操作有问题,默认的一般没有问题,按下面操作: 
 需要使用命令# ifconfig eth0 up启动网卡,默认开机不启用,参考下面的设置后可以使用网卡:
 
 测试IoT板子,使用buildroot默认配置编译出来的image,eth0和eth1都能连上路由器。
 # ifconfig eth0 up
 
 [ 1136.488184] ma35d1-gmac 40120000.ethernet eth0: PHY [stmmac-0:01] driver [RTL8211F Gigabit Ethernet] (irq=POLL)
 [ 1136.499852] ma35d1-gmac 40120000.ethernet eth0: No Safety Features support found
 [ 1136.507300] ma35d1-gmac 40120000.ethernet eth0: No MAC Management Counters available
 [ 1136.515005] ma35d1-gmac 40120000.ethernet eth0: IEEE 1588-2008 Advanced Timestamp supported
 [ 1136.524571] ma35d1-gmac 40120000.ethernet eth0: configuring for phy/rgmii-id link mode
 #
 # [ 1138.587341] ma35d1-gmac 40120000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
 [ 1138.595941] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
 # udhcpc -i eth0
 udhcpc: started, v1.33.1
 udhcpc: sending discover
 udhcpc: sending select for 192.168.1.15
 udhcpc: lease of 192.168.1.15 obtained, lease time 86400
 deleting routers
 adding dns 192.168.1.1
 # [ 1157.017696] ma35d1-gmac 40120000.ethernet eth0: Link is Down
 # ifconfig eth1 up
 [ 1162.207216] ma35d1-gmac 40130000.ethernet eth1: PHY [stmmac-1:01] driver [RTL8201F Fast Ethernet] (irq=POLL)
 [ 1162.228627] ma35d1-gmac 40130000.ethernet eth1: No Safety Features support found
 [ 1162.236080] ma35d1-gmac 40130000.ethernet eth1: No MAC Management Counters available
 [ 1162.243784] ma35d1-gmac 40130000.ethernet eth1: IEEE 1588-2008 Advanced Timestamp supported
 [ 1162.253028] ma35d1-gmac 40130000.ethernet eth1: configuring for phy/rmii link mode
 # udhcpc [ 1164.314960] ma35d1-gmac 40130000.ethernet eth1: Link is Up - 100Mbps/Full - flow control rx/tx
 [ 1164.323569] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
 -i eth1
 udhcpc: started, v1.33.1
 udhcpc: sending discover
 udhcpc: sending select for 192.168.1.16
 udhcpc: lease of 192.168.1.16 obtained, lease time 86400
 deleting routers
 adding dns 192.168.1.1
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