Hi,
I amb developing a project using a w5500 to make UDP and TCP transmissions via Ethernet with a custom board.
In some occasions, after some time with the board working, the router crashes, causing all connected devices to lose internet connection. Working time before the crash may vary from few minutes to full hours, and there are usullay resets in the middle for debug purposes.
As soon as the ethernet is unplugged from the board, router’s behavior goes back to normal and the network internet is restored without the need of reset.
The problem was supposedly caused by not correctly closing the sockets. Recently I solved a part of code that kept some sockets from correctly disconnecting and closing, and the router problem has not repeated ever since. However, I want to make sure if this was the real cause. I will do some testing, but I would love to know the theory behind this misbehavior, what might cause the router to react this way, and get correction if my assumption is wrong.
Additional information:
The created sockets are one UDP to get a DNS ip address, and two TCP sockets.
W5500 source IP and port are configured static.
Devices connected to router use both ethernet and wifi. They all lost internet.
Thanks in advanced for the contributions in that topic.
If any more information is acquired, it will be posted.
Can you share your old code and new one with us?
With both codes, we may be able to investigate what the root cause was.
And do you have any file which you captured packets in when the router crash happened?
If not, I’d like to ask you to capture packets with the old code using wireshark.exe.
I am not allowed to share the code and neither have wireshark captures from the moment of the crash. I can make captures of the current behavior if you want.
Don’t you know any general reason that may cause the router to act like this? Maybe IP or port conflict, or too many open ports?
