1.按其它的开发板，如100ask_imx6ull开发板，已经配好了，NAT网络，ubuntu可以ping通windows和ping通外网，V851S可以ping通windows，
root@TinaLinux:/# ping 192.168.31.210
PING 192.168.31.210 (192.168.31.210): 56 data bytes
64 bytes from 192.168.31.210: seq=0 ttl=128 time=8.055 ms
64 bytes from 192.168.31.210: seq=1 ttl=128 time=8.646 ms
64 bytes from 192.168.31.210: seq=2 ttl=128 time=4.727 ms
64 bytes from 192.168.31.210: seq=3 ttl=128 time=11.510 ms
2.开发板执行
mount -t nfs -o nolock,vers=3,port=2049,mountport=9999 192.168.31.210:/home/book/nfs_rootfs /mnt
超时mount: mounting 192.168.31.210:/home/book/nfs_rootfs on /mnt failed: Operation timed out
3.请问有没有V851S开发板，如何建立一个nfs过程中用来方便传输文件的方法？或其它便捷的方法？用TF卡，效率太低了，谢谢