For a couple of weeks now the router will stop working at random intervals. I will lose connection to the router, DHCP will stop responding, and the only solution I have is to unplug the router and plug it back in. Logs don't really say anything other than the router was disconnected, and I can't ping the router when this happens, but the router will show blinking lights for some ports.

I have an SFP WAN interface and a regular WAN as backup, with a SG3428 switch connected to a LAN port for the internal LAN. Any help is appreciated.