I’m having problems with the connection of my Ethernet.
Even when the interface is UP:
enp57s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 80:fa:5b:6a:a5:d4 brd ff:ff:ff:ff:ff:ff
I’m able to send packages but I’m not able to receive them
enp57s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DEFAULT group default qlen 1000 link/ether 80:fa:5b:6a:a5:d4 brd ff:ff:ff:ff:ff:ff RX: bytes packets errors dropped overrun mcast 0 0 0 0 0 0 TX: bytes packets errors dropped carrier collsns 340265 1877 0 0 0 0
The logs of the network manager usually show this:
NetworkManager[1033]: <info> [1570450750.2616] manager: NetworkManager state is now CONNECTED_GLOBAL NetworkManager[1033]: <info> [1570450888.9975] policy: auto-activating connection 'Wired_connection_1' NetworkManager[1033]: <info> [1570450889.0014] device (enp57s0f1): Activation: starting connection 'Wired_connection_1' (21a7b2ee-5094-3939-9513-c138d8b2edab) NetworkManager[1033]: <info> [1570450889.0024] device (enp57s0f1): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed') NetworkManager[1033]: <info> [1570450889.0031] device (enp57s0f1): state change: prepare -> config (reason 'none', sys-iface-state: 'managed') NetworkManager[1033]: <info> [1570450889.0040] device (enp57s0f1): state change: config -> ip-config (reason 'none', sys-iface-state: 'managed') NetworkManager[1033]: <info> [1570450889.0045] dhcp4 (enp57s0f1): activation: beginning transaction (timeout in 45 seconds) NetworkManager[1033]: <info> [1570450889.0066] dhcp4 (enp57s0f1): dhclient started with pid 10891 dhclient[10891]: DHCPDISCOVER on enp57s0f1 to 255.255.255.255 port 67 interval 3 (xid=0x58746c62) dhclient[10891]: DHCPDISCOVER on enp57s0f1 to 255.255.255.255 port 67 interval 7 (xid=0x58746c62) dhclient[10891]: DHCPDISCOVER on enp57s0f1 to 255.255.255.255 port 67 interval 14 (xid=0x58746c62) dhclient[10891]: DHCPDISCOVER on enp57s0f1 to 255.255.255.255 port 67 interval 15 (xid=0x58746c62) dhclient[10891]: DHCPDISCOVER on enp57s0f1 to 255.255.255.255 port 67 interval 18 (xid=0x58746c62) NetworkManager[1033]: <warn> [1570450934.0052] dhcp4 (enp57s0f1): request timed out NetworkManager[1033]: <info> [1570450934.0054] dhcp4 (enp57s0f1): state changed unknown -> timeout NetworkManager[1033]: <info> [1570450934.0391] dhcp4 (enp57s0f1): canceled DHCP transaction, DHCP client pid 10891 NetworkManager[1033]: <info> [1570450934.0392] dhcp4 (enp57s0f1): state changed timeout -> done NetworkManager[1033]: <info> [1570450934.0409] device (enp57s0f1): state change: ip-config -> failed (reason 'ip-config-unavailable', sys-iface-state: 'managed') NetworkManager[1033]: <warn> [1570450934.0431] device (enp57s0f1): Activation: failed for connection 'Wired_connection_1' NetworkManager[1033]: <info> [1570450934.0439] device (enp57s0f1): state change: failed -> disconnected (reason 'none', sys-iface-state: 'managed')
If I check the status of copper cables everything looks ok
Interface Speed Local pair Pair length Remote pair Pair status --------- ----- ---------- ------------------ ----------- -------------------- Gi0/3 1000M Pair A 41 +/- 10 meters Pair B Normal Pair B 41 +/- 10 meters Pair A Normal Pair C 41 +/- 10 meters Pair D Normal Pair D 41 +/- 10 meters Pair C Normal
The computer seems to be connected when I search the status of the interfaces in the swicth
Gi0/3 A02 - Workstation connected 20 a-full a-1000 10/100/1000BaseTX
Also the switch knows the computer’s mac address:
Mac Address Table ------------------------------------------- Vlan Mac Address Type Ports ---- ----------- -------- ----- 20 80fa.5b6a.a5d4 DYNAMIC Gi0/3
The switch seems to send the packages to the computer but they never arrive
GigabitEthernet0/3 is up, line protocol is up (connected) Description: A02 - Workstation MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX input flow-control is off, output flow-control is unsupported ARP type: ARPA, ARP Timeout 04:00:00 Last input never, output 00:00:07, output hang never Last clearing of "show interface" counters 2w0d Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1886 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 1000 bits/sec, 1 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 5369157 packets input, 905525711 bytes, 0 no buffer Received 27215 broadcasts (20150 multicasts) 0 runts, 0 giants, 0 throttles 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 watchdog, 20150 multicast, 0 pause input 0 input packets with dribble condition detected 7547468 packets output, 3260967444 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 unknown protocol drops 0 babbles, 0 late collision, 0 deferred 0 lost carrier, 0 no carrier, 0 pause output 0 output buffer failures, 0 output buffers swapped out
Finally, for some reason, if I boot up my machine with my Ethernet cable plugged in, my wired connection will not work: even if I replug it, even if I tell my laptop to forget the network. However, if I boot up my system with my Ethernet cable unplugged, and then plug it it after it lands on the desktop, it works just fine. The Wi-Fi works perfectly fine regardless.