Packet errors on RV340W

[DzinPo]

Hello!

I was wondering what can cause packet errors on my network. Especially on LAN2 port, because on this port there is no devices in up state at the moment. Also why there is almost identical count of packet errors on LAN2 and LAN3. Is there any way to find out what causes this? P.S. I reset counters and read values after ~3min.

[DzinPo]

Forget to say that LAN1 is VLAN1; LAN2 is VLAN2 and LAN3 is VLAN3. 

LAN1 receives traffic from unmanaged switches;

LAN2 receives traffic from unmanaged switches;

LAN3 receives traffic from unmanaged switches..also.