[Bug 1623068] Re: Networkd fails to configure a ethernet network device on a 3.4 kernel

[Martin Pitt]

2784  readlinkat(AT_FDCWD, "/sys/devices/virtual/net", 0x40136358, 99) = -1 EINVAL (Invalid argument)
# plus a few more readlinkat()'s failing the same way
2784  writev(2, [{"enp1s0: Could not set route: Inv"..., 45}, {"\n", 1}], 2) = 46

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Title:
  Networkd fails to configure a ethernet network device on a 3.4 kernel

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  Knowing that a 3.4 based kernel is unsupported we have to get it
  working for a specific customer.

  Systemd itself boots up nicely already but networkd fails to configure
  a network device with the following configuration file in
  /etc/systemd/network

  $ cat /etc/systemd/network/enp1s0.network 
  [Match]
  Name=enp1s0

  [Network]
  DNS=8.8.8.8
  Address=192.168.178.30
  Gateway=192.168.178.1

  This gives the following error messages

  $ sudo /lib/systemd/systemd-networkd
  Enumeration completed
  enp1s0: Could not bring up interface: Invalid argument
  enp1s0: Could not set route: Invalid argument

  ifupdown or NetworkManager is reliable able to get the same interface
  up and configured.

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