I have VPN with two routers (ZyXEL) connecter in different places. It worked fine until yesterday, both routers have high outgoing traffic (maximum from provider).
In Port statistics I can see, that LAN traffic is very low, just WAN is about 10Mbps (especially Tx). VPN and internet connection is overburdened.
Port statistics - 1: WAN, 4: LAN
What can be cause of this problem? What I should check?