I'm using Arduino Mega + Eth Shield and it works fine: I can ping it from my PC.
If I connect the arduino behind a OpenWRT running as bridge, no way to ping. OpenWRT is working good (I test with other IP device and it doens0t stop the bridge communcation).
Is there some limit in Arrduino Eth Shield?
Not quite enough info.
If you’re running OpenWRT as a bridge, that’s fine, but if the two devices are on separate subnets - that means there is a ‘router’ still in the mix, and you still need tunnelling or port forwarding in place to get through.
but if in stand of arduino I use another device (ex. Raspberry Pi) I can ping it trough OpenWRT (it works as bridge, no need routing)
Check if your Arduino IP stack supports IGMP (protocol used by ping)
it support: with a PC I can properly ping Arduino
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