The specific operations are as follows：
My Customized board have two network ports, run two tasks that send UDP(Non blocking) packets to IP addresses and ports of two different network segments every 50ms. and we use two PCs at the other end of the network to receive the data packets sent by the two tasks respectively.
Now, both PCs can receive the correct packets from the board.
If I unplug the network cable of one of the two ports, the sendto function of corresponding tasks continuously returns 0x40(Host is down) errors, while the other port works normally, and the corresponding PC can receive data normally and Ping the board. If the network cable is plugged back into the network port, the data communication can also be restored.
It can work all the time. it is OK.
It can work all the time. it is OK.
But, if power up the board again in the current network connection state(there is a network port without a network cable), at the beginning, the task of the port without a network cable returns error code 0x40(Host is down) errors, the other port works normally and connected PC can receive data normally and Ping the board. but after running for some time, task of the port without a network cable returns 0x37(No buffer space available) errors, and the other port works abnormally, After running for a period of time, the tasks of the two network interfaces return errors code 0x37. the connected PC can not receive data and ping the board return unable to access the target host . now If the network cable is plugged back into the network port, the data communication can not be restored.
The Network communication of two ports are shutdown.
How can we avoid the Network communication shutdown when sendto a udp packet without one network cable inserted into the network port on power on?
processor_sdk_rtos_am437x_6_01_00_08, pdk_am437x_1_0_16, bios_6_76_02_02, ndk_3_61_01_01,
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