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Ethernet comm stucks after several reconnection

lavanya
Associate III

Hi Team,

I am using STM32F7 nucleo board, FREERTOS CMSIS V2, LAN8742 Eth driver. I am working with LWIP stack  FULLDUPLEX 100Mbps configuration.

configured MCU as a server and re-establish communication in LWIP default thread.

1. case 1: Ethernet communication is working fine if I communicate every 50msec. (transmitting/receiving  250 bytes)

2. case 2: i. If I transmit and receive every 10msec, after several reconnection(removing ethernet cable and               connecting it again) ethernet communication got lost, but all other functionalities are working(other threads).

ii. In this case tried ethernet cable plug out and plug in Link up and link down is detecting but communication not established, Ethernet communication re-established only after MCU reset. 

iii. I tried debugging..but i didn't got any soln 

 So anyone can help me and give me some tips to solve this problem.

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