Re: TCP/IP stops working after awhile
Not a lot of info to understand what might be happening.
Are you running a standard demo app or is this something that you created?
If it's a custom app, try to use a demo that's part of the Harmony release.
Then work with just one interface for your tests, maybe we can isolate where the problem is.
Increase the heap size, like:
#define TCPIP_STACK_DRAM_SIZE 79250
and see if this has any impact.
Try to add a serial console - if you have an UART port on this board, so we can make few checks when the issue occurs.