since my last post, internet speed is slow at random. I called ISP they say its good on their said. lost ????

I powered the ER 5120 and everything is working, all parameters are the same as before, no problems. WAN showing ip MTU 1500, working for 3 hours Thank you for the post and I know what to do next time

Model : Hardware Version : Firmware Version : ISP : I have ER 5120 working for 6 months, than it stop no internet I have fiber optic internet from their box (Alcatel Lucent) which gives me one feed...