ip addr fails to list the devices with the associated information and throws an exception

[msubietab]

In the past versions (two or three ago, cannot really tell when this issue started), when issuing the ip addr command at the prompt I would get a list of all the adapters on my mac with their ip address and associated information. Currently when issuing the same command, I get the following error (in more than one mac, btw):

└» ip addr
Traceback (most recent call last):
File "/opt/homebrew/Cellar/iproute2mac/1.5.1/libexec/ip", line 713, in
main(sys.argv[1:])
File "/opt/homebrew/Cellar/iproute2mac/1.5.1/libexec/iproute2mac.py", line 96, in inner
if not func(*args, **kwargs):
^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/iproute2mac/1.5.1/libexec/ip", line 706, in main
return cmd_func(argv, af, json_print, pretty_json)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/iproute2mac/1.5.1/libexec/iproute2mac.py", line 96, in inner
if not func(*args, **kwargs):
^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/iproute2mac/1.5.1/libexec/ip", line 394, in do_addr
return do_addr_show(argv, af, json_print, pretty_json)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/iproute2mac/1.5.1/libexec/ip", line 407, in do_addr_show
return link_addr_show(argv, af, json_print, pretty_json, True)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/iproute2mac/1.5.1/libexec/ip", line 106, in link_addr_show
links = parse_ifconfig(res, af, address)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/iproute2mac/1.5.1/libexec/ip", line 31, in parse_ifconfig
(ifname, flags, mtu, ifindex) = re.findall(
^^^^^^^^^^^
IndexError: list index out of range

[brona]

Thank you for the bug report. Can you please attach output of: ifconfig -a -v ip -V

[msubietab]

IPConfig output:

─» ifconfig -a -v
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384 index 1
eflags=12000000<ECN_DISABLE,SENDLIST>
xflags=4
options=1203<RXCSUM,TXCSUM,TXSTATUS,SW_TIMESTAMP>
hwassist=29000ff<CSUM_IP,CSUM_TCP,CSUM_UDP,CSUM_IP_FRAGS,CSUM_FRAGMENT,CSUM_TCPIPV6,CSUM_UDPIPV6,CSUM_FRAGMENT_IPV6,MULTIPAGES,TXSTATUS,SW_TIMESTAMP>
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
nd6 options=201<PERFORMNUD,DAD>
generation id: 1
link quality: 100 (good)
state availability: 0 (true)
timestamp: disabled
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280 index 2
eflags=1000000<ECN_ENABLE>
generation id: 2
state availability: 0 (true)
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
stf0: flags=0<> mtu 1280 index 3
eflags=1000000<ECN_ENABLE>
generation id: 3
state availability: 0 (true)
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
anpi0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 4
eflags=41000080<TXSTART,ECN_ENABLE,FASTLN_ON>
xflags=2000
options=400<CHANNEL_IO>
ether aa:70:f7:d2:55:dd
netif: 0AAD8362-C18D-4169-8D05-30B331F8465F
media: none
status: inactive
generation id: 4
type: USB Ethernet
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
anpi2: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 5
eflags=41000080<TXSTART,ECN_ENABLE,FASTLN_ON>
xflags=2000
options=400<CHANNEL_IO>
ether aa:70:f7:d2:55:df
netif: 04D112F6-D129-4C2E-8EEB-BEF0875DDA53
media: none
status: inactive
generation id: 5
type: USB Ethernet
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
anpi1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 6
eflags=41000080<TXSTART,ECN_ENABLE,FASTLN_ON>
xflags=2000
options=400<CHANNEL_IO>
ether aa:70:f7:d2:55:de
netif: 4F8DE025-6882-4DCE-90F5-C85FBB5908B7
media: none
status: inactive
generation id: 6
type: USB Ethernet
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
en4: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 7
eflags=41000080<TXSTART,ECN_ENABLE,FASTLN_ON>
options=400<CHANNEL_IO>
ether aa:70:f7:d2:55:bd
netif: 580CE6C9-5657-44E6-A982-5B2412EADA6B
flowswitch: 3DA368FC-AE3C-45B4-8913-038E949B8DA6
nd6 options=201<PERFORMNUD,DAD>
media: none
status: inactive
generation id: 7
type: USB Ethernet
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
agent domain:Skywalk type:FlowSwitch flags:0x4403 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
en5: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 8
eflags=41000080<TXSTART,ECN_ENABLE,FASTLN_ON>
options=400<CHANNEL_IO>
ether aa:70:f7:d2:55:be
netif: 9A153740-BB05-4F29-8CDD-58DFBEE0B985
flowswitch: CDD1422E-908F-49E7-9C0F-9DAFC4A33EDC
nd6 options=201<PERFORMNUD,DAD>
media: none
status: inactive
generation id: 8
type: USB Ethernet
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
agent domain:Skywalk type:FlowSwitch flags:0x4403 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
en7: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 9
eflags=41000080<TXSTART,ECN_ENABLE,FASTLN_ON>
options=400<CHANNEL_IO>
ether aa:70:f7:d2:55:bf
netif: 285F9DE3-8E7E-4BF6-8724-0E12CCCA7950
flowswitch: 586211A9-304E-4258-A4B2-5CB94371D446
nd6 options=201<PERFORMNUD,DAD>
media: none
status: inactive
generation id: 9
type: USB Ethernet
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
agent domain:Skywalk type:FlowSwitch flags:0x4403 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
en1: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 index 10
eflags=41000080<TXSTART,ECN_ENABLE,FASTLN_ON>
options=460<TSO4,TSO6,CHANNEL_IO>
hwassist=700000<MULTIPAGES,TSO_V4,TSO_V6>
ether 36:8d:10:8c:49:40
netif: E6137383-4B91-4F1E-AB61-389F5BBD676F
media: autoselect
status: inactive
generation id: 10
type: IP over Thunderbolt
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 index 11
eflags=41000080<TXSTART,ECN_ENABLE,FASTLN_ON>
options=460<TSO4,TSO6,CHANNEL_IO>
hwassist=700000<MULTIPAGES,TSO_V4,TSO_V6>
ether 36:8d:10:8c:49:44
netif: E3AE29F8-2778-478F-8F9D-1BD7922FB2F7
media: autoselect
status: inactive
generation id: 11
type: IP over Thunderbolt
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
en3: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500 index 12
eflags=41000080<TXSTART,ECN_ENABLE,FASTLN_ON>
options=460<TSO4,TSO6,CHANNEL_IO>
hwassist=700000<MULTIPAGES,TSO_V4,TSO_V6>
ether 36:8d:10:8c:49:48
netif: B182B062-1B15-4791-A79A-34EBEF49A26B
media: autoselect
status: inactive
generation id: 12
type: IP over Thunderbolt
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 13
eflags=41010000<CLONE,ECN_ENABLE,FASTLN_ON>
options=63<RXCSUM,TXCSUM,TSO4,TSO6>
hwassist=700067<CSUM_IP,CSUM_TCP,CSUM_UDP,CSUM_TCPIPV6,CSUM_UDPIPV6,MULTIPAGES,TSO_V4,TSO_V6>
ether 36:8d:10:8c:49:40
Configuration:
id 0:0:0:0:0:0 priority 0 hellotime 0 fwddelay 0
maxage 0 holdcnt 0 proto stp maxaddr 100 timeout 1200
root id 0:0:0:0:0:0 priority 0 ifcost 0 port 0
ipfilter disabled flags 0x0
member: en1 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 10 priority 0 path cost 0
hostfilter 0 hw: 0:0:0:0:0:0 ip: 0.0.0.0
member: en2 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 11 priority 0 path cost 0
hostfilter 0 hw: 0:0:0:0:0:0 ip: 0.0.0.0
member: en3 flags=3<LEARNING,DISCOVER>
ifmaxaddr 0 port 12 priority 0 path cost 0
hostfilter 0 hw: 0:0:0:0:0:0 ip: 0.0.0.0
nd6 options=201<PERFORMNUD,DAD>
media:
status: inactive
generation id: 13
state availability: 0 (true)
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
ap1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 14
eflags=45200080<TXSTART,NOACKPRI,ECN_ENABLE,CHANNEL_DRV,FASTLN_ON>
options=6460<TSO4,TSO6,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
hwassist=703000<CSUM_PARTIAL,CSUM_ZERO_INVERT,MULTIPAGES,TSO_V4,TSO_V6>
ether 7e:e9:1e:7b:d9:40
inet6 fe80::7ce9:1eff:fe7b:d940%ap1 prefixlen 64 scopeid 0xe
netif: DD3E7E74-1548-434D-8592-2E62F4C86543
flowswitch: BA2644B5-1365-4564-84E0-662B77BEF068
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
generation id: 14
type: Wi-Fi
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
agent domain:Skywalk type:FlowSwitch flags:0x4403 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL (driver managed)
link rate: 10.00 Mbps
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 15
eflags=45200890<ADV_REPORT,TXSTART,ARPLL,NOACKPRI,ECN_ENABLE,CHANNEL_DRV,FASTLN_ON>
xflags=1
options=6460<TSO4,TSO6,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
hwassist=703000<CSUM_PARTIAL,CSUM_ZERO_INVERT,MULTIPAGES,TSO_V4,TSO_V6>
ether 5c:e9:1e:7b:d9:40
inet6 fe80::c0f:b8f7:706d:9232%en0 prefixlen 64 secured scopeid 0xf
inet 10.196.187.187 netmask 0xff000000 broadcast 10.255.255.255
netif: 2130F9EE-7FC5-469C-8FD7-F919E8CF3759
flowswitch: C7446CE9-09F3-40F5-A900-215A5F35308A
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
generation id: 15
type: Wi-Fi
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
agent domain:Skywalk type:FlowSwitch flags:0x4403 desc:"Userspace Networking"
agent domain:WiFiManager type:CallInProgress flags:0x3d desc:"WiFi"
link quality: 100 (good)
state availability: 0 (true)
scheduler: FQ_CODEL (driver managed)
uplink rate: 232.71 Mbps [eff] / 273.78 Mbps
downlink rate: 232.71 Mbps [eff] / 273.78 Mbps [max]
qosmarking enabled: yes mode: fastlane
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
awdl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 16
eflags=453e0080<TXSTART,LOCALNET_PRIVATE,ND6ALT,RESTRICTED_RECV,AWDL,NOACKPRI,ECN_ENABLE,CHANNEL_DRV,FASTLN_ON>
options=6460<TSO4,TSO6,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
hwassist=703000<CSUM_PARTIAL,CSUM_ZERO_INVERT,MULTIPAGES,TSO_V4,TSO_V6>
ether 52:43:a4:eb:c3:9b
inet6 fe80::5043:a4ff:feeb:c39b%awdl0 prefixlen 64 scopeid 0x10
netif: 965AE17E-225E-48C3-A24D-414447E44A71
flowswitch: 4769487C-9346-4C5A-AD19-6F381B989810
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
generation id: 16
type: Wi-Fi
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
agent domain:Skywalk type:FlowSwitch flags:0x4403 desc:"Userspace Networking"
agent domain:com.apple.wifip2pd type:AWDL flags:0x203 desc:"com.apple.wifip2pd AWDL"
state availability: 0 (true)
scheduler: FQ_CODEL (driver managed)
link rate: 10.00 Mbps
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 17
eflags=45200090<ADV_REPORT,TXSTART,NOACKPRI,ECN_ENABLE,CHANNEL_DRV,FASTLN_ON>
xflags=400
options=400<CHANNEL_IO>
ether 52:43:a4:eb:c3:9b
inet6 fe80::5043:a4ff:feeb:c39b%llw0 prefixlen 64 scopeid 0x11
netif: 27B277DC-04EA-45BA-8F59-6290F26B4E71
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: inactive
generation id: 17
type: Wi-Fi
agent domain:Skywalk type:NetIf flags:0x4c3 desc:"Userspace Networking"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
feth9174: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 2800 index 18
eflags=41010080<TXSTART,CLONE,ECN_ENABLE,FASTLN_ON>
xflags=4
ether 66:65:74:68:23:d6
peer: feth4174
media: autoselect
status: active
generation id: 18
type: Ethernet
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
feth4174: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 5000 mtu 2800 index 19
eflags=41010080<TXSTART,CLONE,ECN_ENABLE,FASTLN_ON>
xflags=4
ether ae:6b:72:60:89:5c
inet 172.24.0.11 netmask 0xffff0000 broadcast 172.24.255.255
peer: feth9174
media: autoselect
status: active
generation id: 19
type: Ethernet
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500 index 20
eflags=1002080<TXSTART,NOAUTOIPV6LL,ECN_ENABLE>
xflags=4
inet6 fe80::7a5e:1dfc:9be0:c77e%utun0 prefixlen 64 scopeid 0x14
nd6 options=201<PERFORMNUD,DAD>
generation id: 22
agent domain:com.apple.rapport type:RapportNetworkAgent flags:0x7c3 desc:"Rapport Network Agent"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380 index 21
eflags=1002080<TXSTART,NOAUTOIPV6LL,ECN_ENABLE>
xflags=4
inet6 fe80::5077:1018:8428:4477%utun1 prefixlen 64 scopeid 0x15
nd6 options=201<PERFORMNUD,DAD>
generation id: 23
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
utun2: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000 index 22
eflags=1002080<TXSTART,NOAUTOIPV6LL,ECN_ENABLE>
xflags=4
inet6 fe80::a18a:f4b1:8859:d9e7%utun2 prefixlen 64 scopeid 0x16
nd6 options=201<PERFORMNUD,DAD>
generation id: 24
agent domain:ids501 type:clientchannel flags:0xc3 desc:"IDSNexusAgent ids501 : clientchannel"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
utun3: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1000 index 23
eflags=1002080<TXSTART,NOAUTOIPV6LL,ECN_ENABLE>
xflags=4
inet6 fe80::ce81:b1c:bd2c:69e%utun3 prefixlen 64 scopeid 0x17
nd6 options=201<PERFORMNUD,DAD>
generation id: 25
agent domain:ids501 type:transport flags:0x4c3 desc:"IDSTransportAgent ids501 : transport"
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
utun4: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1400 index 24
eflags=1002080<TXSTART,NOAUTOIPV6LL,ECN_ENABLE>
xflags=4
inet 172.25.11.87 --> 172.25.11.87 netmask 0xffffffff
generation id: 26
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
utun5: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380 index 25
eflags=1002080<TXSTART,NOAUTOIPV6LL,ECN_ENABLE>
xflags=4
inet6 fe80::57a8:9f1f:be64:f5e1%utun5 prefixlen 64 scopeid 0x19
nd6 options=201<PERFORMNUD,DAD>
generation id: 27
state availability: 1 (false)
scheduler: FQ_CODEL
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
utun6: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380 index 26
eflags=1002080<TXSTART,NOAUTOIPV6LL,ECN_ENABLE>
xflags=4
inet6 fe80::524:928e:b219:18cb%utun6 prefixlen 64 scopeid 0x1a
nd6 options=201<PERFORMNUD,DAD>
generation id: 28
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: no mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
en13: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 28
eflags=61000080<TXSTART,ECN_ENABLE,DIRECTLINK,FASTLN_ON>
xflags=2000
options=404<VLAN_MTU,CHANNEL_IO>
hwassist=20000<VLAN_MTU>
ether 9e:d6:32:7a:41:56
inet6 fe80::9cd6:32ff:fe7a:4156%en13 prefixlen 64 scopeid 0x1c
netif: 6CD98DAB-440B-4EFE-87D3-14EA73F7F2EB
flowswitch: C78ABB5E-C0F8-4262-823D-E9ACD158FCAC
nd6 options=201<PERFORMNUD,DAD>
media: autoselect
status: active
generation id: 37
type: USB Ethernet
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
agent domain:Skywalk type:FlowSwitch flags:0x4403 desc:"Userspace Networking"
link quality: 100 (good)
state availability: 0 (true)
scheduler: FQ_CODEL
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled
en18: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500 index 27
eflags=410008c1<AUTOCONFIGURING,ACCEPT_RTADV,TXSTART,ARPLL,ECN_ENABLE,FASTLN_ON>
options=404<VLAN_MTU,CHANNEL_IO>
hwassist=20000<VLAN_MTU>
ether 52:57:8a:27:b7:9b
inet6 fe80::89b:8a2d:d5fd:d37d%en18 prefixlen 64 secured scopeid 0x1b
inet 169.254.225.136 netmask 0xffff0000 broadcast 169.254.255.255
netif: 9C63E9A4-4D80-4B19-A9F8-95AFC09A4D6F
flowswitch: D9F6DC44-78BD-40CF-8D51-338C44BFA091
nd6 options=201<PERFORMNUD,DAD>
media: autoselect (100baseTX )
status: active
generation id: 38
type: USB Ethernet
agent domain:Skywalk type:NetIf flags:0xa443 desc:"Userspace Networking"
agent domain:Skywalk type:FlowSwitch flags:0x4403 desc:"Userspace Networking"
link quality: 100 (good)
state availability: 0 (true)
scheduler: FQ_CODEL
link rate: 100.00 Mbps
qosmarking enabled: yes mode: none
low power mode: disabled
multi layer packet logging (mpklog): disabled
routermode4: disabled
routermode6: disabled

ip -V output:
─» ip -V
iproute2mac, v1.5.1

[brona]

Thank you, the problematic line was:
feth4174: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 5000 mtu 2800 index 19

I am releasing v1.5.2 with the fix.

[brona]

Homebrew/homebrew-core#180419 in progress, fixed in HEAD.

@signal-09 FYI