I am having LAN speed issues on my SOHO MK3 (firmware 7.1.0 build 1284). WiFi seems to be fine.
I have a 200 Mbps plan using Spectrum. I am getting 206 Mbps when connecting my desktop directly to the cable modem (over Ethernet), bypassing the Soho. When I connect my desktop computer to the Soho (over Ethernet) and the Soho to my cable modem, my speed drops to 46 Mbps. (Using Spectrum’s speed test on their site.)
My WiFi speed is acceptable - 81 Mbps with my phone sitting next to the Soho. Would be nice if I could juice that a bit to the 100 or 120 Mbps limit of the Soho, but I’ll take 81 over 46 for now.
I must have something mis-configured in my router configuration. I have tried changing the Port Speed from Auto to “1000Mbps Full Duplex” under the WAN connection details, and also tried changing MTU from the default of “Custom 1440” to Auto, with no change in speed. My WAN Connection upload and download bandwidth settings are both a 1 Gbps.