Arris S34 2.5Gb port speed issue I suspect there is an issue with using the 2.5Gb Ethernet port on my Arris S34 modem at an actual 2.5Gb speed, I have repeated extensive testing which I'll summarize here, but I'm happy to go into more detail if needed. My ISP is Xfinity and I have been using the S34 modem without issue, getting around 940Mb downstream and 180Mb upstream via my 1Gb home LAN. I wanted to upgrade my home network to 2.5Gb (some parts are already 10Gb) so I invested in some 2.5Gb hardware (NIC, switch, new CAT6 cabling, etc.) and while all devices are connected and working as expected at 2.5Gb (verified via iPerf3), I am not able to use the 2.5Gb port on the Arris S34 at the expected speeds. I have tried several different 2.5Gb NICs and they all exhibit the same behavior: S34 1Gb port connected to 1Gb NIC = no issues, 940Mb downstream.S34 2.5Gb port connected to 1Gb NIC = no issues, 940Mb downstream.S34 1Gb port connected to 2.5Gb NIC = no issues,