NFS出现 VFS: Cannot open root device "nfs" or unknown-block(2,0)错误的一个原因

NFS经常出现如下错误，一直解决不了。

[ 13.950186] bootserver=192.168.1.30, rootserver=192.168.1.30, rootpath=

[ 13.957033] link_reset() speed: 10 duplex: 0

[ 49.040099] VFS: Unable to mount root fs via NFS, trying floppy.

[ 49.044793] VFS: Cannot open root device "nfs" or unknown-block(2,0)

[ 49.050975] Please append a correct "root=" boot option; here are the available partitions:

偶然间，我发现我的电脑与另一台电脑用网线直连（想用feiQ传东西来着），IP地址设同一段，结果ping不通。

于是，将我的电脑本地连接禁用后再重启，OK！可以ping通了。

再将开发板重启，一切都解决了。