Hello Yongqin, > When I tried the down and up operations manually from the command line, > it worked. > But it only worked after I ran the down and up operations after the boot. > It fails to work by default after the boot for both the fresh deployment, > and for the later reboot Ok, so it works as well for you after the initialization. > One thing I noticed is that the following message was printed twice > "ax88179_178a 2-3:1.0 eth0: ax88179 - Link status is: 1" > after I ran the up operation, > > Is that expected? > > For details, please check the log here: > https://gist.github.com/liuyq/be8f5305d538067a344001f1d35f677b That is another thing that I am analyzing, to clean those spurious. But they are appearing in my case too, and I am not modifying anything at boot time. > The scripts are simple, here are the two scripts for Android build: > https://android.googlesource.com/device/linaro/dragonboard/+/refs/heads/main/shared/utils/ethaddr/ethaddr.rc > https://android.googlesource.com/device/linaro/dragonboard/+/refs/heads/main/shared/utils/ethaddr/set_ethaddr.sh > > Is the one to run the down/change mac/up operations script. > > Not sure why the up in the script does not work, but works when run manually. Ok, I am not working with Android but it doesn't seem spscial, the only doubt is when the script is executed, if the driver initialization is complete, ... Anyway, I will try to reproduce here and analyze it. Best regards José Ignacio