[Bug 1664844] Re: No distinction between link-up and link-down interfaces

[Łukasz Zemczak]

** Also affects: nplan (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: nplan (Ubuntu Zesty)
   Importance: Undecided
       Status: New

** Also affects: nplan (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1664844

Title:
  No distinction between link-up and link-down interfaces

Status in MAAS:
  Triaged
Status in netplan:
  Triaged
Status in nplan package in Ubuntu:
  New
Status in nplan source package in Xenial:
  New
Status in nplan source package in Zesty:
  New

Bug description:
  If I define an interface in netplan (even one which has no DHCP type
  and no addresses), it's not possible to determine if its adminStatus
  should be enabled (link up) or disabled (link down).

  I can completely exclude an interface from the netplan configuration,
  but I think that implies that not only its adminStatus is "disabled"
  by default, but also netplan will not be able to do anything "nice"
  for the interface, such as rename it to what the user specified in
  MAAS.

  If I include the interface but don't specify any addresses or DHCP, it
  isn't clear if it will be link up (my current assumption) or link
  down.

  There should be a way to allow an interface to be recognized by
  netplan (and even partially configured, waiting for the user to run
  something like 'ifup <interface>' on a manual but not auto-started
  interface in ifupdown), but marked administratively disabled.
  (adminStatus down)

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