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TDA4VM: System stuck when input 'ifconfig'

Part Number: TDA4VM

I use the SDK of version 7.2. During startup, I occasionally find that the network is blocked after startup in the Linux system. If I enter 'ifconfig', The system will jam. After I added a few seconds delay in front of my network configuration script, the problem no longer occurred. At present, I suspect that the link that the network depends on has not been fully established during network configuration. What is the dependence of the network? Should I solve the problem of blocking, do I set the network after detecting that the link is completed, or is there any way to prevent it from blocking?