For a TCP server channel in W5300, once the Sn_SSR(Socket status register) value becomes 0x10 or 0x11 then the while chip behaves erratically, and then we find it impossible to bring the socket back to listening mode. This is mentioned in their errata sheet, but the work around suggested by them do not work. Currently, we reset the chip to clear the issue. But has anybody found any better method to solve the issue? Wiznet support is pretty bad!!