SK-AM62A-LP: How to set U-Boot environment values to mount NFS on AM62A custom board

Part Number: SK-AM62A-LP

Tool/software:

Hi, TI experts

      I reference to this post https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1196598/sk-am62-nfs-boot-setup-on-am62a-board, set U-Boot environment values as figure below.

The Image and k3-am62a7-sk.dtb can be transfered from PC to my board, but cannot mount NFS,when booting the kernal,the root filesystem mounts the filesystem in the mmc storage device,as boot log show below.

Please help me how should I configure the U-Boot environments to mount NFS during boot procedure.

Looking forward to your respons.Thanks!