Hi3559网络不通问题

网络芯片RTL8211FI，设计按照DEMO板来的，配置地址001，外部RX、TX延迟。
启动提示：

libphy: hisi_gemac_mii_bus: probed
libphy: hisi_gemac_mii_bus: probed
libphy: Fixed MDIO Bus: probed
hi_gmac_v200 101c0000.ethernet: invalid resource
hi_gmac_v200 101c0000.ethernet (unnamed net_device) (uninitialized): using random MAC address d6:e3:9d:46:53:eb
attached PHY 1 to driver Generic PHY, PHY_ID=0x1cc916
Higmac dma_sg_phy: 0x00000000ffc80000
ETH: rgmii, phy_addr=1

但进入系统后，ifconfig显示：

~ # ifconfig -a
eth0      Link encap:Ethernet  HWaddr 2E:2D:9C:09:90:D7
          inet addr:192.168.0.181  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:43

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

万用表测试各部分电压正常，用示波器测试25M晶振工作正常，CLK_OUT输出125M波形。
问题：网口灯不亮，PING外部网络不通，外部也PING不通此板，何解？