1, Both the remote device and the SFP+ port show no link lights
Most likely a compatibility issue
Check if your switch/router supports 10GBASE-T SFP+ modules
Some devices only support optical modules, not RJ45 ones
2,Remote device shows link light, but SFP+ port doesnt
Possible speed mismatch
Ensure the remote port supports 10Gbps
Use CAT6a or CAT7 cables, under 30 meters (max for 10GBASE-T)
3, SFP+ port link light is on, but no network connection
Not a compatibility issue likely a network configuration issue
Check VLAN settings, port status, or firewall rules
Confirm IP address settings and routing configuration
Troubleshooting Guide for 10GBASE-T RJ45 SFP+ Modules