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[Bug 1997922] [NEW] RuntimeError: duplicate mac found! both 'swp1' and 'swp3' have mac '32:98:88:9c:2d:29'

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Public bug reported:

Hi,

This is Aristo from OEM Enablement team in Taiwan, I am currently enabling a device that has 1 Ethernet port and 4 Etherent switch port, and I will get the following error on first boot
"""
[   22.855169] cloud-init[519]: Cloud-init v. 22.3.4-0ubuntu1~22.04.1 running 'init-local' at Fri, 25 Nov 2022 01:23:27 +0000. Up 22.75 seconds.
[   23.745575] cloud-init[519]: 2022-11-25 01:23:28,899 - util.py[WARNING]: failed stage init-local
[   23.764650] cloud-init[519]: failed run of stage init-local
[   23.780376] cloud-init[519]: ------------------------------------------------------------
[   23.796379] cloud-init[519]: Traceback (most recent call last):
[   23.812604] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 767, in status_wrapper
[   23.832472] cloud-init[519]:     ret = functor(name, args)
[   23.848500] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 433, in main_init
[   23.869966] cloud-init[519]:     init.apply_network_config(bring_up=bring_up_interfaces)
[   23.888410] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 922, in apply_network_config
[   23.908494] cloud-init[519]:     self.distro.networking.wait_for_physdevs(netcfg)
[   23.928436] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/distros/networking.py", line 148, in wait_for_physdevs
[   23.952413] cloud-init[519]:     present_macs = self.get_interfaces_by_mac().keys()
[   23.972380] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/distros/networking.py", line 75, in get_interfaces_by_mac
[   23.996508] cloud-init[519]:     return net.get_interfaces_by_mac(
[   24.012399] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/net/__init__.py", line 926, in get_interfaces_by_mac
[   24.036393] cloud-init[519]:     return get_interfaces_by_mac_on_linux(
[   24.056387] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/net/__init__.py", line 1007, in get_interfaces_by_mac_on_linux
[   24.080426] cloud-init[519]:     raise RuntimeError(
[   24.099221] cloud-init[519]: RuntimeError: duplicate mac found! both 'swp1' and 'swp3' have mac '9a:57:7d:78:47:c0'
[   24.120454] cloud-init[519]: ------------------------------------------------------------

"""


The network-config is
"""
#cloud-config
version: 2
ethernets:
  enp0s0f0:
    dhcp4: true
    optional: true
"""


Here is all the interfaces
"""
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp0s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 16:11:29:db:df:62 brd ff:ff:ff:ff:ff:ff
3: enp0s0f2: <BROADCAST,MULTICAST> mtu 1520 qdisc noop state DOWN group default qlen 1000
    link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff
4: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
    link/can 
5: can1: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
    link/can 
6: swp0@enp0s0f2: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff
7: swp1@enp0s0f2: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff
8: swp2@enp0s0f2: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff
9: swp3@enp0s0f2: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff

"""

Please let me know if you need any further info from me, thanks!

** Affects: cloud-init
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1997922

Title:
  RuntimeError: duplicate mac found! both 'swp1' and 'swp3' have mac
  '32:98:88:9c:2d:29'

Status in cloud-init:
  New

Bug description:
  Hi,

  This is Aristo from OEM Enablement team in Taiwan, I am currently enabling a device that has 1 Ethernet port and 4 Etherent switch port, and I will get the following error on first boot
  """
  [   22.855169] cloud-init[519]: Cloud-init v. 22.3.4-0ubuntu1~22.04.1 running 'init-local' at Fri, 25 Nov 2022 01:23:27 +0000. Up 22.75 seconds.
  [   23.745575] cloud-init[519]: 2022-11-25 01:23:28,899 - util.py[WARNING]: failed stage init-local
  [   23.764650] cloud-init[519]: failed run of stage init-local
  [   23.780376] cloud-init[519]: ------------------------------------------------------------
  [   23.796379] cloud-init[519]: Traceback (most recent call last):
  [   23.812604] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 767, in status_wrapper
  [   23.832472] cloud-init[519]:     ret = functor(name, args)
  [   23.848500] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/cmd/main.py", line 433, in main_init
  [   23.869966] cloud-init[519]:     init.apply_network_config(bring_up=bring_up_interfaces)
  [   23.888410] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 922, in apply_network_config
  [   23.908494] cloud-init[519]:     self.distro.networking.wait_for_physdevs(netcfg)
  [   23.928436] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/distros/networking.py", line 148, in wait_for_physdevs
  [   23.952413] cloud-init[519]:     present_macs = self.get_interfaces_by_mac().keys()
  [   23.972380] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/distros/networking.py", line 75, in get_interfaces_by_mac
  [   23.996508] cloud-init[519]:     return net.get_interfaces_by_mac(
  [   24.012399] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/net/__init__.py", line 926, in get_interfaces_by_mac
  [   24.036393] cloud-init[519]:     return get_interfaces_by_mac_on_linux(
  [   24.056387] cloud-init[519]:   File "/usr/lib/python3/dist-packages/cloudinit/net/__init__.py", line 1007, in get_interfaces_by_mac_on_linux
  [   24.080426] cloud-init[519]:     raise RuntimeError(
  [   24.099221] cloud-init[519]: RuntimeError: duplicate mac found! both 'swp1' and 'swp3' have mac '9a:57:7d:78:47:c0'
  [   24.120454] cloud-init[519]: ------------------------------------------------------------

  """

  
  The network-config is
  """
  #cloud-config
  version: 2
  ethernets:
    enp0s0f0:
      dhcp4: true
      optional: true
  """

  
  Here is all the interfaces
  """
  $ ip a
  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
      inet 127.0.0.1/8 scope host lo
         valid_lft forever preferred_lft forever
      inet6 ::1/128 scope host 
         valid_lft forever preferred_lft forever
  2: enp0s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether 16:11:29:db:df:62 brd ff:ff:ff:ff:ff:ff
  3: enp0s0f2: <BROADCAST,MULTICAST> mtu 1520 qdisc noop state DOWN group default qlen 1000
      link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff
  4: can0: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
      link/can 
  5: can1: <NOARP,ECHO> mtu 16 qdisc noop state DOWN group default qlen 10
      link/can 
  6: swp0@enp0s0f2: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff
  7: swp1@enp0s0f2: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff
  8: swp2@enp0s0f2: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff
  9: swp3@enp0s0f2: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether 9a:57:7d:78:47:c0 brd ff:ff:ff:ff:ff:ff

  """

  Please let me know if you need any further info from me, thanks!

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