segfault schriebEinige Anmerkungen:
Auf dem "kaputten" Host würde ich so mit tcpdump kucken:
tcpdump -n -p -e -i enp5s0f0
Voila
Stecker raus/Stecker rein nach dem Zeitstempel 16:50:44.084084
$ sudo tcpdump -n -p -e -i enp5s0f0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on enp5s0f0, link-type EN10MB (Ethernet), capture size 262144 bytes
16:50:19.384577 00:19:99:71:d8:af > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: :: > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48
16:50:19.416262 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 332: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:19:99:71:d8:af, length 290
16:50:19.444594 00:19:99:71:d8:af > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: :: > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48
16:50:20.114571 00:19:99:71:d8:af > 33:33:ff:a8:c0:ad, ethertype IPv6 (0x86dd), length 86: :: > ff02::1:ffa8:c0ad: ICMP6, neighbor solicitation, who has fe80::9b48:3541:aa8:c0ad, length 32
16:50:20.434540 00:19:99:71:d8:af > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: :: > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48
16:50:21.154608 00:19:99:71:d8:af > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: fe80::9b48:3541:aa8:c0ad > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48
16:50:21.194540 00:19:99:71:d8:af > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: fe80::9b48:3541:aa8:c0ad > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48
16:50:21.342947 00:19:99:71:d8:af > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 62: fe80::9b48:3541:aa8:c0ad > ff02::2: ICMP6, router solicitation, length 8
16:50:21.364494 00:19:99:71:d8:af > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: fe80::9b48:3541:aa8:c0ad > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48
16:50:21.416266 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 332: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:19:99:71:d8:af, length 290
16:50:21.574512 00:19:99:71:d8:af > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: fe80::9b48:3541:aa8:c0ad > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48
16:50:21.578156 00:19:99:71:d8:af > 33:33:00:00:00:fb, ethertype IPv6 (0x86dd), length 200: fe80::9b48:3541:aa8:c0ad.5353 > ff02::fb.5353: 0*- [0q] 2/0/0 (Cache flush) PTR warp10.local., (Cache flush) AAAA fe80::9b48:3541:aa8:c0ad (138)
16:50:23.783680 00:19:99:71:d8:af > 33:33:00:00:00:fb, ethertype IPv6 (0x86dd), length 200: fe80::9b48:3541:aa8:c0ad.5353 > ff02::fb.5353: 0*- [0q] 2/0/0 (Cache flush) PTR warp10.local., (Cache flush) AAAA fe80::9b48:3541:aa8:c0ad (138)
16:50:24.198627 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 332: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:19:99:71:d8:af, length 290
16:50:25.343932 00:19:99:71:d8:af > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 62: fe80::9b48:3541:aa8:c0ad > ff02::2: ICMP6, router solicitation, length 8
16:50:28.941150 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 332: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:19:99:71:d8:af, length 290
16:50:29.343768 00:19:99:71:d8:af > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 62: fe80::9b48:3541:aa8:c0ad > ff02::2: ICMP6, router solicitation, length 8
16:50:37.549982 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 332: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:19:99:71:d8:af, length 290
16:50:39.778283 00:19:99:71:1e:b9 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.178.51 tell 192.168.178.103, length 46
16:50:39.856391 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 330: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:19:99:71:d8:af, length 288
16:50:40.496642 00:19:99:71:1e:b9 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.178.51 tell 192.168.178.103, length 46
16:50:41.496582 00:19:99:71:1e:b9 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 60: Request who-has 192.168.178.51 tell 192.168.178.103, length 46
16:50:44.084084 00:19:99:71:d8:af > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70: fe80::9b48:3541:aa8:c0ad > ff02::2: ICMP6, router solicitation, length 16
--------------------------------------------------------------------------------
hier umstecken und kurz danach ist das Interface funktionstüchtig
--------------------------------------------------------------------------------
16:51:12.475743 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 330: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:19:99:71:d8:af, length 288
16:51:12.480436 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 590: 192.168.178.1.67 > 192.168.178.110.68: BOOTP/DHCP, Reply, length 548
16:51:12.480604 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 342: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:19:99:71:d8:af, length 300
16:51:12.481923 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 332: 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from 00:19:99:71:d8:af, length 290
16:51:12.482000 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 590: 192.168.178.1.67 > 192.168.178.110.68: BOOTP/DHCP, Reply, length 548
16:51:12.484583 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 590: 192.168.178.1.67 > 192.168.178.110.68: BOOTP/DHCP, Reply, length 548
16:51:12.504467 00:19:99:71:d8:af > 01:00:5e:00:00:16, ethertype IPv4 (0x0800), length 54: 192.168.178.110 > 224.0.0.22: igmp v3 report, 1 group record(s)
16:51:12.504479 00:19:99:71:d8:af > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: :: > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48
16:51:12.594557 00:19:99:71:d8:af > 33:33:ff:a8:c0:ad, ethertype IPv6 (0x86dd), length 86: :: > ff02::1:ffa8:c0ad: ICMP6, neighbor solicitation, who has fe80::9b48:3541:aa8:c0ad, length 32
16:51:12.661649 00:19:99:71:d8:af > 01:00:5e:00:00:fb, ethertype IPv4 (0x0800), length 252: 192.168.178.110.5353 > 224.0.0.251.5353: 0 [3q] [4n] ANY (QM)? d.a.0.c.8.a.a.0.1.4.5.3.8.4.b.9.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. ANY (QM)? warp10.local. ANY (QM)? 110.178.168.192.in-addr.arpa. (210)
16:51:12.731348 00:19:99:71:d8:af > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42: Request who-has 192.168.178.1 tell 192.168.178.110, length 28
16:51:12.731803 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype ARP (0x0806), length 60: Reply 192.168.178.1 is-at 24:65:11:e1:1b:18, length 46
16:51:12.731812 00:19:99:71:d8:af > 24:65:11:e1:1b:18, ethertype IPv4 (0x0800), length 77: 192.168.178.110.42494 > 192.168.178.1.53: 62902+ A? www.archlinux.org. (35)
16:51:12.731815 00:19:99:71:d8:af > 24:65:11:e1:1b:18, ethertype IPv4 (0x0800), length 77: 192.168.178.110.54563 > 192.168.178.1.53: 48871+ AAAA? www.archlinux.org. (35)
16:51:12.732994 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 212: 192.168.178.1.53 > 192.168.178.110.42494: 62902 2/3/0 CNAME apollo.archlinux.org., A 138.201.81.199 (170)
16:51:12.733338 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 224: 192.168.178.1.53 > 192.168.178.110.54563: 48871 2/3/0 CNAME apollo.archlinux.org., AAAA 2a01:4f8:172:1d86::1 (182)
16:51:12.798252 00:19:99:71:d8:af > 24:65:11:e1:1b:18, ethertype IPv4 (0x0800), length 74: 192.168.178.110.49778 > 138.201.81.199.80: Flags [S], seq 4022329118, win 64240, options [mss 1460,sackOK,TS val 1902284791 ecr 0,nop,wscale 7], length 0
16:51:12.849703 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 74: 138.201.81.199.80 > 192.168.178.110.49778: Flags [S.], seq 2134788498, ack 4022329119, win 65160, options [mss 1452,sackOK,TS val 2005124632 ecr 1902284791,nop,wscale 7], length 0
16:51:12.849758 00:19:99:71:d8:af > 24:65:11:e1:1b:18, ethertype IPv4 (0x0800), length 66: 192.168.178.110.49778 > 138.201.81.199.80: Flags [.], ack 1, win 502, options [nop,nop,TS val 1902284843 ecr 2005124632], length 0
16:51:12.849817 00:19:99:71:d8:af > 24:65:11:e1:1b:18, ethertype IPv4 (0x0800), length 165: 192.168.178.110.49778 > 138.201.81.199.80: Flags [P.], seq 1:100, ack 1, win 502, options [nop,nop,TS val 1902284843 ecr 2005124632], length 99: HTTP: GET /check_network_status.txt HTTP/1.1
16:51:12.893695 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 66: 138.201.81.199.80 > 192.168.178.110.49778: Flags [.], ack 100, win 509, options [nop,nop,TS val 2005124675 ecr 1902284843], length 0
16:51:12.893802 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 276: 138.201.81.199.80 > 192.168.178.110.49778: Flags [P.], seq 1:211, ack 100, win 509, options [nop,nop,TS val 2005124675 ecr 1902284843], length 210: HTTP: HTTP/1.1 200 OK
16:51:12.893817 00:19:99:71:d8:af > 24:65:11:e1:1b:18, ethertype IPv4 (0x0800), length 66: 192.168.178.110.49778 > 138.201.81.199.80: Flags [.], ack 211, win 501, options [nop,nop,TS val 1902284887 ecr 2005124675], length 0
16:51:12.893911 00:19:99:71:d8:af > 24:65:11:e1:1b:18, ethertype IPv4 (0x0800), length 66: 192.168.178.110.49778 > 138.201.81.199.80: Flags [F.], seq 100, ack 211, win 501, options [nop,nop,TS val 1902284887 ecr 2005124675], length 0
16:51:12.894121 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 66: 138.201.81.199.80 > 192.168.178.110.49778: Flags [F.], seq 211, ack 100, win 509, options [nop,nop,TS val 2005124675 ecr 1902284843], length 0
16:51:12.894137 00:19:99:71:d8:af > 24:65:11:e1:1b:18, ethertype IPv4 (0x0800), length 66: 192.168.178.110.49778 > 138.201.81.199.80: Flags [.], ack 212, win 501, options [nop,nop,TS val 1902284887 ecr 2005124675], length 0
16:51:12.912319 00:19:99:71:d8:af > 01:00:5e:00:00:fb, ethertype IPv4 (0x0800), length 252: 192.168.178.110.5353 > 224.0.0.251.5353: 0 [3q] [4n] ANY (QM)? d.a.0.c.8.a.a.0.1.4.5.3.8.4.b.9.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. ANY (QM)? warp10.local. ANY (QM)? 110.178.168.192.in-addr.arpa. (210)
16:51:12.945957 24:65:11:e1:1b:18 > 00:19:99:71:d8:af, ethertype IPv4 (0x0800), length 66: 138.201.81.199.80 > 192.168.178.110.49778: Flags [.], ack 101, win 509, options [nop,nop,TS val 2005124728 ecr 1902284887], length 0
16:51:13.044571 00:19:99:71:d8:af > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 110: :: > ff02::16: HBH ICMP6, multicast listener report v2, 2 group record(s), length 48
16:51:13.064527 00:19:99:71:d8:af > 01:00:5e:00:00:16, ethertype IPv4 (0x0800), length 54: 192.168.178.110 > 224.0.0.22: igmp v3 report, 1 group record(s)
16:51:13.162864 00:19:99:71:d8:af > 01:00:5e:00:00:fb, ethertype IPv4 (0x0800), length 252: 192.168.178.110.5353 > 224.0.0.251.5353: 0 [3q] [4n] ANY (QM)? d.a.0.c.8.a.a.0.1.4.5.3.8.4.b.9.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. ANY (QM)? warp10.local. ANY (QM)? 110.178.168.192.in-addr.arpa. (210)
16:51:13.363065 00:19:99:71:d8:af > 01:00:5e:00:00:fb, ethertype IPv4 (0x0800), length 234: 192.168.178.110.5353 > 224.0.0.251.5353: 0*- [0q] 4/0/0 (Cache flush) PTR warp10.local., (Cache flush) A 192.168.178.110, (Cache flush) PTR warp10.local., (Cache flush) AAAA fe80::9b48:3541:aa8:c0ad (192)
16:51:13.479239 00:19:99:71:d8:af > 24:65:11:e1:1b:18, ethertype IPv4 (0x0800), length 71: 192.168.178.110.57956 > 192.168.178.1.53: 58301+ A? mozilla.org. (29)
# Nach dem Umstecken (Sollte das vor dem Umstecken in der nächsten Runde anders aussehen, trage ich das noch nach)
$ ip -4 n s
192.168.178.1 dev enp5s0f0 lladdr 24:65:11:e1:1b:18 REACHABLE
$ sudo pacman -Syu
:: Synchronizing package databases...
core 134.1 KiB 958 KiB/s 00:00 [###############################] 100%
extra is up to date
community 5.0 MiB 1098 KiB/s 00:05 [###############################] 100%
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...
Packages (8) curl-7.71.1-1 libappindicator-gtk3-12.10.0.r296-1 linux-lts-5.4.50-1
linux-lts-headers-5.4.50-1 popt-1.18-1 qt5-base-5.15.0-4 r8168-lts-8.048.03-8
tslib-1.22-1
Total Download Size: 102.80 MiB
Total Installed Size: 251.97 MiB
Net Upgrade Size: 0.03 MiB
:: Proceed with installation? [Y/n] y
:: Retrieving packages...
curl-7.71.1-1-x86_64 1039.4 KiB 1444 KiB/s 00:01 [###############################] 100%
popt-1.18-1-x86_64 67.7 KiB 3.30 MiB/s 00:00 [###############################] 100%
linux-lts-5.4.50-1-x86_64 68.3 MiB 1795 KiB/s 00:39 [###############################] 100%
linux-lts-headers-5.4.5... 20.2 MiB 1854 KiB/s 00:11 [###############################] 100%
tslib-1.22-1-x86_64 100.0 KiB 2001 KiB/s 00:00 [###############################] 100%
qt5-base-5.15.0-4-x86_64 12.9 MiB 1786 KiB/s 00:07 [###############################] 100%
libappindicator-gtk3-12... 52.6 KiB 1053 KiB/s 00:00 [###############################] 100%
r8168-lts-8.048.03-8-x86_64 115.5 KiB 1651 KiB/s 00:00 [###############################] 100%
(8/8) checking keys in keyring [###############################] 100%
(8/8) checking package integrity [###############################] 100%
(8/8) loading package files [###############################] 100%
(8/8) checking for file conflicts [###############################] 100%
(8/8) checking available disk space [###############################] 100%
:: Running pre-transaction hooks...
(1/1) Removing linux initcpios...
:: Processing package changes...
(1/8) upgrading curl [###############################] 100%
(2/8) upgrading popt [###############################] 100%
(3/8) upgrading libappindicator-gtk3 [###############################] 100%
(4/8) upgrading linux-lts [###############################] 100%
(5/8) upgrading linux-lts-headers [###############################] 100%
(6/8) upgrading tslib [###############################] 100%
(7/8) upgrading qt5-base [###############################] 100%
(8/8) upgrading r8168-lts [###############################] 100%
:: Running post-transaction hooks...
(1/3) Arming ConditionNeedsUpdate...
(2/3) Updating module dependencies...
(3/3) Updating linux initcpios...
==> Building image from preset: /etc/mkinitcpio.d/linux-lts.preset: 'default'
-> -k /boot/vmlinuz-linux-lts -c /etc/mkinitcpio.conf -g /boot/initramfs-linux-lts.img
==> Starting build: 5.4.50-1-lts
-> Running build hook: [base]
-> Running build hook: [udev]
-> Running build hook: [autodetect]
-> Running build hook: [modconf]
-> Running build hook: [block]
-> Running build hook: [lvm2]
-> Running build hook: [filesystems]
-> Running build hook: [keyboard]
-> Running build hook: [fsck]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: /boot/initramfs-linux-lts.img
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux-lts.preset: 'fallback'
-> -k /boot/vmlinuz-linux-lts -c /etc/mkinitcpio.conf -g /boot/initramfs-linux-lts-fallback.img -S autodetect
==> Starting build: 5.4.50-1-lts
-> Running build hook: [base]
-> Running build hook: [udev]
-> Running build hook: [modconf]
-> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: wd719x
==> WARNING: Possibly missing firmware for module: aic94xx
-> Running build hook: [lvm2]
-> Running build hook: [filesystems]
-> Running build hook: [keyboard]
-> Running build hook: [fsck]
==> Generating module dependencies
==> Creating gzip-compressed initcpio image: /boot/initramfs-linux-lts-fallback.img
==> Image generation successful
$
Der Update hat nicht zur Beseitigung des primären Problems geführt.
Edit: Das ip -4 n s gibt im Fehlerfall (also vor dem Umstecken) nichts aus.