Esp32 Power Off cause entire LAN crash

[worldhugo]

Hi,


I have an impossible problem for several days !

I'm developing a system to send Unicast packet to multiple ESP32 (currently ESP32 Dev Kit) over wifi.
My setup :
- Wifi router (test with 3 different)
- 1 PC, physically connected to the router, send Unicast packet to ESP32 and to another PC
- 2 ESP32 connected to the Wifi router, receive Unicast packet
- 1 MAC, connected to the router by Wifi, receive Unicast packet (just for test)

All I working good, with correct refresh rate, etc ...

But :
If I power off one ESP32 (simply disconnect USB cable), all the Network crash (the other ESP32 are not receiving the packet, the other PC either, and PING command a very long).
The problem does not appear if I just use "Wifi.disconnect(true);" on one of the ESP32, or if I disconnect the MAC ....


It's as if the router did not understand that the ESP32 is no longer there and that it was overflowing .....

I really don't understand, please help !

Thanks,

Hugo