u-boot> setenv serverip 10.163.2.126
u-boot> setenv nfspath /data/work/em5root/
u-boot> setenv hostname pandapc01
u-boot> setenv bootargs root=/dev/nfs rw nfsroot=$(serverip):$(nfspath),rsize=1024,wsize=1024 ip=$(ipaddr):::$(netmask):$(hostname) debug console=ttyS0,38400 nfsrootdebug;
u-boot> setenv bootcmd tftpboot zImage\; wtags\; go
u-boot> printenv
u-boot> saveenv
u-boot> reset