Review on 🔌 SFP+10GBASE-T Copper RJ45 Transceiver Module | Compatible with Dell GP-10GSFP-T | Up to 30m Reach | Ideal for Data Centers, Switches, Routers by Denise Kirkeby

Most of the time it works for me but there is an annoying bug, at least when used on the CBS350 series: This transceiver reports to the device as 10 -Gigabit fiber with a connection speed of 10 gigabits, regardless of the actual connection speed of the connected device. This correctly negotiates the link speed at the transceiver level and transmits packets at 1 Gigabit and 2.5 Gigabit speeds. However, I am concerned that the switch thinks it can carry 10 gigabits per link. I have no idea what problems this will cause in practice, but I expect high packet loss as I get closer to link speed since the switch doesn't know it needs to buffer packets. Of course, you can lower your connection speed to 1 gigabit, but the CBS350 series doesn't allow you to force the speed to 2.5 or 5 gigabits. I don't know if these problems are Cisco bugs, bugs in the transceiver's firmware, or a combination of the above. In any event, until this reporting issue is resolved, I would probably avoid this transceiver on a Cisco 350 series hardware if you plan to use a link speed other than 10 gigabit or 1 gigabit.