yocto udhcpc problem

[meeeeeei]

Hi:

I use udhcpc -i eth0 command in IMX8MP yocto system to get ip address, but eth1 node will be down, why

[Zhiming_Liu]

Can you see eth0 with ifconfig?

[meeeeeei]

Hi: Zhiming_Liu

ifconfig has only eth0 nodes，All other wlan0 eth1 nodes are down

[Zhiming_Liu]

Please check the driver status

[meeeeeei]

How to check the driver state, I found that only the first time to use udhcpc will appear this problem, and the automatically obtained ip address will not take effect, after the use of udhcpc will not have this problem, I wonder if you have found this problem before

[Zhiming_Liu]

Can you share BSP version? Let me check it on my side.

[meeeeeei]

My bsp version is 6.1-langdale.

[Zhiming_Liu]

This is udhcpc command issue, the udhcpc will down the another interface on userspace layer.

[meeeeeei]

I found that Ubuntu system udhcpc has no related issues, then how to solve this problem

[Zhiming_Liu]

When we run the udhcpc command it will disable all the interface,but only enable the one we used currently at last. For the detail information you can reference the /etc/udhcpc.d/50default script. You can enable the other interface using ifconfig tool.

ifconfig eth0/eth1 up

[Zhiming_Liu]

Hi 

We are trying to find root cause