Is this the same as your other thread? If so, why not just use that one?
Those messages are irrelevant unless you are using IPv6. Have you tried a different cable?
"carrier-changed" is due to the link on that device going down. It's likely to be a Layer 1 issue (physical).
Different cable, check ports are clean, check your switch/router is functioning properly, etc.
If you've tested and it's not the machine, try a new cable. If it still happens with the new cable, it's your router/switch.