版主好：
我用自己的板子，网卡用的是rtl8201，连接之后黄灯一直亮，绿灯不亮。ping不通外部主机。请各位指教一下，已经折腾好久了。
下面是u-boot的启动信息：
Using DaVinci-EMAC device
ping failed; host 192.168.1.111 is not alive
Using DaVinci-EMAC device
ping failed; host 192.168.1.153 is not alive
Using DaVinci-EMAC device
ping failed; host 169.254.100.187 is not alive
baudrate=115200
bootargs=console=ttyS0,115200n8 mem=60M noinitrd rw ip=192.168.1.220:192.168.1.151:192.168.1.1:255.255.255.0 root=/tftpboot nfsroot=192.168.1.151:/tftpboot,nolock
bootcmd=run ping updatecore;bootm 0x80700000
bootdelay=3
bootfile="uImage"
eraseall=nand erase 0x00000000 0x08000000
eraseenv=nand erase 0x00060000 0x00020000
ethact=DaVinci-EMAC
ethaddr=00:01:02:03:04:05
gatewayip=192.168.1.1
ipaddr=192.168.1.220
nand_boot=nboot 0x80700000 0 0x100000;bootm
netmask=255.255.255.0
ping=ping 192.168.1.111;ping 192.168.1.153;ping 169.254.100.187;printenv
serverip=192.168.1.153
stderr=serial
stdin=serial
stdout=serial
tftp_boot=tftpboot 0x80700000 uImage;bootm
updatecore=tftp 0x84000000 uImage;nand erase 0x003C0000 0x00300000;nand write 84000000 3C0000 300000
updateuboot=tftp 0x84000000 u-boot.img;nand erase 80000 80000;nand write 84000000 80000 80000
ver=U-Boot 2010.12-rc2 (Jan 20 2014 - 13:26:22)
Environment size: 965/131068 bytes
Using DaVinci-EMAC device
TFTP from server 192.168.1.153; our IP address is 192.168.1.220
Filename 'uImage'.
Load address: 0x84000000
Loading: *T T
