First thank you to give me some time to resolve this problem. I've already posted this message, but on the wrong forum (AskUbuntu), sorry about this.But I haven't solved it yet, so I post it there.As title say, I use a Raspberry pi 3b. The OS is Raspbian jessie.I don't understand why I can't connect with any RJ45 cable, and only wireless connection works. The cable rj45 is straight.The step I did to resolve my problem :Remove wireless connection in case there is a conflict whenconfiguring the interfaces. Now there isn't anymore the wlan0interface.Disable firewall.Configure manually the eth0 interface in the etc/network/interfacesto make the configuration automatically when booting the system. Theresult of ifconfig is that I have a lot of packets Transmited byeth0, but no packets received, but IP address is correct.root@raspberrypi:/home/pi# ifconfig:eth0  Link encap:Ethernet  HWaddr b8:27:eb:fa:42:e6    inet addr:(masked but correct IP)  Bcast:192.168.1.255  Mask:255.255.255.0  inet6 addr: (masked but correct) Scope:Link  UP BROADCAST MULTICAST  MTU:1500  Metric:1  RX packets:0 errors:0 dropped:0 overruns:0 frame:0  TX packets:4384 errors:0 dropped:0 overruns:0 carrier:0  collisions:0 txqueuelen:1000   RX bytes:0 (0.0 B)  TX bytes:706089 (689.5 KiB)lo        Link encap:Local Loopback    inet addr:127.0.0.1  Mask:255.0.0.0  inet6 addr: ::1/128 Scope:Host  UP LOOPBACK RUNNING  MTU:65536  Metric:1  RX packets:4719 errors:0 dropped:0 overruns:0 frame:0  TX packets:4719 errors:0 dropped:0 overruns:0 carrier:0  collisions:0 txqueuelen:1   RX bytes:373537 (364.7 KiB)  TX bytes:373537 (364.7 KiB)I've tried using three different cables, but none worked.Can someone give me a trail to follow or an Idea ?Thank you.EDIT: Informations about ethtool eth0 commandEDIT 2 : dmesg output
Why my Raspberry pi receive no packets using Ethernet?
raspberry pi;raspbian;ethernet;interface;packet