Ethernet disconnects but wifi is stable
by bulgin from LinuxQuestions.org on (#5C18Y)
Hello.
Ubuntu 20.04
Trying to troubleshoot this issue. My Ethernet connection keeps dropping out but not when using wifi. I've tested cables and USB Ethernet adapter and they are fine. Here is some output from troubleshooting which perhaps a network guru can help me with. Please tell me what I can do to help you help me. Thanks.
================================================
tail -f /var/log/syslog | grep 'carrier off'
Dec 23 11:53:06 lap kernel: [ 384.540407] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 11:54:09 lap kernel: [ 448.060746] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 11:54:16 lap kernel: [ 455.452725] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 11:54:26 lap kernel: [ 465.404633] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 11:54:33 lap kernel: [ 472.252959] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:40:16 lap kernel: [12189.640210] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:40:44 lap kernel: [12217.863619] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:44:31 lap kernel: [12444.871830] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:45:06 lap kernel: [12479.464082] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:45:12 lap kernel: [12485.895947] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:49:56 lap kernel: [12769.480639] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 16:34:43 lap kernel: [15456.681335] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 16:36:17 lap kernel: [15550.505518] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 16:36:23 lap kernel: [15557.160004] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 17:01:49 lap kernel: [17082.695814] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 17:02:54 lap kernel: [17147.688148] r8152 1-1:1.0 enx00e02c568246d: carrier off
================================================
root@lap:~# sudo lshw -c network
*-network DISABLED
description: Wireless interface
product: Wireless 8265 / 8275
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 78
serial: 98:3f:8f:d6:d4:71
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.4.0-58-generic firmware=36.77d01142.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:129 memory:ef100000-ef101fff
*-network
description: Ethernet interface
physical id: 1
bus info: usb@1:1
logical name: enx00e02c568246d
serial: 00:e0:4c:02:00:4d
size: 100Mbit/s
capacity: 1Gbit/s
capabilities: Ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=off broadcast=yes driver=r8152 driverversion=v1.10.11 duplex=full ip=lap192.168.50.199 link=yes multicast=yes port=MII speed=100Mbit/s
================================================
ethtool enx00e02c568246d
Settings for enx00e02c568246d:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: off
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00007fff (32767)
drv probe link timer ifdown ifup rx_err tx_err tx_queued intr tx_done rx_status pktdata hw wol
Link detected: yes
================================================
unusual traffic to: 151.101.129.69 (fastly.com):
root@lap:~# tcpdump -i enx00e02c568246d
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on enx00e02c568246d, link-type EN10MB (Ethernet), capture size 262144 bytes
17:37:00.168280 LLDP, length 194: RT-AC68U
17:37:00.438028 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:02.438164 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:04.438258 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:06.437685 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:08.438257 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:10.168365 LLDP, length 194: RT-AC68U
17:37:10.268414 IP lap.57080 > 151.101.129.69.https: Flags [P.], seq 3566586491:3566586646, ack 1595744951, win 3903, options [nop,nop,TS val 3713135353 ecr 3435231194], length 155
17:37:10.268438 IP lap.36450 > dns.google.domain: 33705+ [1au] AAAA? askubuntu.com. (42)
17:37:10.268532 IP lap.57080 > 151.101.129.69.https: Flags [P.], seq 155:262, ack 1, win 3903, options [nop,nop,TS val 3713135353 ecr 3435231194], length 107
17:37:10.270305 IP lap.55085 > dns.google.domain: 31153+ [1au] PTR? 69.129.101.151.in-addr.arpa. (56)
17:37:10.312961 IP 151.101.129.69.https > lap.57080: Flags [.], ack 262, win 187, options [nop,nop,TS val 3435276250 ecr 3713135353], length 0
17:37:10.313653 IP 151.101.129.69.https > lap.57080: Flags [P.], seq 1:43, ack 262, win 187, options [nop,nop,TS val 3435276250 ecr 3713135353], length 42
17:37:10.313698 IP lap.57080 > 151.101.129.69.https: Flags [.], ack 43, win 3903, options [nop,nop,TS val 3713135399 ecr 3435276250], length 0
17:37:10.318654 IP dns.google.domain > lap.55085: 31153 NXDomain 0/1/1 (116)
17:37:10.318977 IP lap.55085 > dns.google.domain: 31153+ PTR? 69.129.101.151.in-addr.arpa. (45)
17:37:10.327230 IP 151.101.129.69.https > lap.57080: Flags [P.], seq 43:597, ack 262, win 187, options [nop,nop,TS val 3435276265 ecr 3713135353], length 554
17:37:10.327273 IP lap.57080 > 151.101.129.69.https: Flags [.], ack 597, win 3924, options [nop,nop,TS val 3713135412 ecr 3435276265], length 0
17:37:10.349877 IP dns.google.domain > lap.55085: 31153 NXDomain 0/1/0 (105)
17:37:10.351253 IP lap.49254 > dns.google.domain: 38960+ [1au] PTR? 199.50.168.192.in-addr.arpa. (56)
17:37:10.365989 IP dns.google.domain > lap.49254: 38960 NXDomain 0/0/1 (56)
17:37:10.366311 IP lap.49254 > dns.google.domain: 38960+ PTR? 199.50.168.192.in-addr.arpa. (45)
17:37:10.380788 IP dns.google.domain > lap.49254: 38960 NXDomain 0/0/0 (45)
17:37:10.385615 IP dns.google.domain > lap.36450: 33705 0/1/1 (126)
17:37:10.437959 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
Ubuntu 20.04
Trying to troubleshoot this issue. My Ethernet connection keeps dropping out but not when using wifi. I've tested cables and USB Ethernet adapter and they are fine. Here is some output from troubleshooting which perhaps a network guru can help me with. Please tell me what I can do to help you help me. Thanks.
================================================
tail -f /var/log/syslog | grep 'carrier off'
Dec 23 11:53:06 lap kernel: [ 384.540407] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 11:54:09 lap kernel: [ 448.060746] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 11:54:16 lap kernel: [ 455.452725] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 11:54:26 lap kernel: [ 465.404633] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 11:54:33 lap kernel: [ 472.252959] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:40:16 lap kernel: [12189.640210] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:40:44 lap kernel: [12217.863619] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:44:31 lap kernel: [12444.871830] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:45:06 lap kernel: [12479.464082] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:45:12 lap kernel: [12485.895947] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 15:49:56 lap kernel: [12769.480639] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 16:34:43 lap kernel: [15456.681335] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 16:36:17 lap kernel: [15550.505518] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 16:36:23 lap kernel: [15557.160004] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 17:01:49 lap kernel: [17082.695814] r8152 1-3:1.0 enx00e02c568246d: carrier off
Dec 23 17:02:54 lap kernel: [17147.688148] r8152 1-1:1.0 enx00e02c568246d: carrier off
================================================
root@lap:~# sudo lshw -c network
*-network DISABLED
description: Wireless interface
product: Wireless 8265 / 8275
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlp2s0
version: 78
serial: 98:3f:8f:d6:d4:71
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.4.0-58-generic firmware=36.77d01142.0 latency=0 link=no multicast=yes wireless=IEEE 802.11
resources: irq:129 memory:ef100000-ef101fff
*-network
description: Ethernet interface
physical id: 1
bus info: usb@1:1
logical name: enx00e02c568246d
serial: 00:e0:4c:02:00:4d
size: 100Mbit/s
capacity: 1Gbit/s
capabilities: Ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=off broadcast=yes driver=r8152 driverversion=v1.10.11 duplex=full ip=lap192.168.50.199 link=yes multicast=yes port=MII speed=100Mbit/s
================================================
ethtool enx00e02c568246d
Settings for enx00e02c568246d:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: Not reported
Advertised pause frame use: No
Advertised auto-negotiation: No
Advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: off
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00007fff (32767)
drv probe link timer ifdown ifup rx_err tx_err tx_queued intr tx_done rx_status pktdata hw wol
Link detected: yes
================================================
unusual traffic to: 151.101.129.69 (fastly.com):
root@lap:~# tcpdump -i enx00e02c568246d
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on enx00e02c568246d, link-type EN10MB (Ethernet), capture size 262144 bytes
17:37:00.168280 LLDP, length 194: RT-AC68U
17:37:00.438028 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:02.438164 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:04.438258 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:06.437685 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:08.438257 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43
17:37:10.168365 LLDP, length 194: RT-AC68U
17:37:10.268414 IP lap.57080 > 151.101.129.69.https: Flags [P.], seq 3566586491:3566586646, ack 1595744951, win 3903, options [nop,nop,TS val 3713135353 ecr 3435231194], length 155
17:37:10.268438 IP lap.36450 > dns.google.domain: 33705+ [1au] AAAA? askubuntu.com. (42)
17:37:10.268532 IP lap.57080 > 151.101.129.69.https: Flags [P.], seq 155:262, ack 1, win 3903, options [nop,nop,TS val 3713135353 ecr 3435231194], length 107
17:37:10.270305 IP lap.55085 > dns.google.domain: 31153+ [1au] PTR? 69.129.101.151.in-addr.arpa. (56)
17:37:10.312961 IP 151.101.129.69.https > lap.57080: Flags [.], ack 262, win 187, options [nop,nop,TS val 3435276250 ecr 3713135353], length 0
17:37:10.313653 IP 151.101.129.69.https > lap.57080: Flags [P.], seq 1:43, ack 262, win 187, options [nop,nop,TS val 3435276250 ecr 3713135353], length 42
17:37:10.313698 IP lap.57080 > 151.101.129.69.https: Flags [.], ack 43, win 3903, options [nop,nop,TS val 3713135399 ecr 3435276250], length 0
17:37:10.318654 IP dns.google.domain > lap.55085: 31153 NXDomain 0/1/1 (116)
17:37:10.318977 IP lap.55085 > dns.google.domain: 31153+ PTR? 69.129.101.151.in-addr.arpa. (45)
17:37:10.327230 IP 151.101.129.69.https > lap.57080: Flags [P.], seq 43:597, ack 262, win 187, options [nop,nop,TS val 3435276265 ecr 3713135353], length 554
17:37:10.327273 IP lap.57080 > 151.101.129.69.https: Flags [.], ack 597, win 3924, options [nop,nop,TS val 3713135412 ecr 3435276265], length 0
17:37:10.349877 IP dns.google.domain > lap.55085: 31153 NXDomain 0/1/0 (105)
17:37:10.351253 IP lap.49254 > dns.google.domain: 38960+ [1au] PTR? 199.50.168.192.in-addr.arpa. (56)
17:37:10.365989 IP dns.google.domain > lap.49254: 38960 NXDomain 0/0/1 (56)
17:37:10.366311 IP lap.49254 > dns.google.domain: 38960+ PTR? 199.50.168.192.in-addr.arpa. (45)
17:37:10.380788 IP dns.google.domain > lap.49254: 38960 NXDomain 0/0/0 (45)
17:37:10.385615 IP dns.google.domain > lap.36450: 33705 0/1/1 (126)
17:37:10.437959 STP 802.1d, Config, Flags [none], bridge-id 8000.d0:17:c2:59:5a:28.8001, length 43