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Netgear CM1200 modem dropping internet, random lagging in games
I originally had an Arris SB6183 that was working fine until it died after a lightning storm. I pulled out my old Arris SB6141 to replace it temporarily. The SB6141 also worked fine for the past few months with the exception that I was only getting ~300Mbps on my 400Mbps plan (this is expected as it only has 8x4 channels).
A couple days ago, I replaced it with the Netgear CM1200. Internet works fine for a while until it randomly slows down (very noticeable in games) and sometimes drops connection several times a day, and then recovers without rebooting. All lights on the modem are solid green, except for the upload light which is constantly blinking green (indicates cable modem is scanning for an upstream channel). When the internet is working, speedtest.net shows ~470Mbps down/~22Mbps up, and ping ~20ms. Also, I am not using LAG/port aggregation.
Anyone else having issues with the CM1200? Should I try to get a technician out, or return the CM1200 and try out the Arris SB8200? I'll probably switch back to the SB6141 later today or tomorrow.