DHCP with manual address? What if it's on auto DHCP? Failing that you may need to run this in Terminal,
Bash:
ifconfig en0 media 1000baseT
thanks for your answer
1/ Location --> Automatic
2/ if i am using DHCP there is no info showing up
3/ then i go to Manuel, i filled the fields, the green led says connected, but i can't see any DSN server and search domain
4/ i went to advanced setting --hardware Manually 100baseT full duplex custom 1500
Tried connect to internet nothing.
At which moment i have to run the terminal command ?