On my RB2011 I have noticed single packets showing up on Tx of active ETH interfaces, even if PC connected to said interface is hibernating. I have no idea where these come from, this traffic do not come through WAN interface, I cannot see them among active connections in the Firewall. As a matter of fact, even if I physically disconnect all the cables, except one signle, local, hibernating PC - it still gets ping, ping, ping from TX every second. It is some internal MT way of checking active interfaces, or something? If so, can I turn it off?
I torched the interface and the culprit seems to be this. But what is that?
