Region : Poland

Model : TL-ER6120

Hardware Version : V1

Firmware Version : 1.0.1 Build 20130618 Rel.46227

ISP : WASK

Without any warning, the router internal switch doesn't work,
the traffic before down is at 2Mbit/s (200 - 500 packets/s) (from specyfication documents I know that router should handle traffic up to 80Mbit/s)

In NAT section i have few virtual servers defined to forward web/ssh traffic into internal servers

I can open vpn channel and use web interface of the router,
in diagnostic section i can't ping internal (lan) servers
load of the core is at very low level 3%

but after restart/reboot of the firewall everything goes okey and site is back again

Everybody would agree with me that it is impossible to manually reboot firewall after it's switch down.

sometimes, after the 1-2 hours the switch comes up (it is info from external site down monitoring service)

there is nothing in logs about switch down :-(