[Bug 1519120] Re: NetworkManager VLAN support fails unless vlan package is manually installed

[Mike Pontillo]

Another note: in addition to VLANs, NetworkManager lists other interface
types for which the dependencies aren't installed as well:

    Bond
    Bridge
    Team

The "ifenslave" and "bridge-utils" package would be needed for bonds and
bridges to work out of the box. (I think bridge-utils might already be
present on Xenial server since LXD requires bridges, but I'm not sure
about desktop.)

The "Team" option seems to be a Red Hat technology (in 'universe' in
Ubuntu) which should probably be hidden from the menu unless the
dependency is installed (separate issue).

In summary, I think that not having these packages installed by default
is a usability problem for both Ubuntu Server and Ubuntu Desktop. IMHO,
we should ensure the following packages are recommended by at least
`network-manager` and possibly `ifupdown`:

    vlan
    bridge-utils
    ifenslave

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https://bugs.launchpad.net/bugs/1519120

Title:
  NetworkManager VLAN support fails unless vlan package is manually
  installed

Status in network-manager package in Ubuntu:
  Confirmed
Status in vlan package in Ubuntu:
  Invalid

Bug description:
  I tried to use the network manager UI to define a VLAN interface, and
  nothing happened. There are a few bugs here:

  (1) When creating a VLAN interface through the UI, the "vlan interface
  name" must be filled in. This should just default to <interface-
  name>.<vid>, rather than being a required field. (I typed in "vlan100"
  to get the "Save" button to activate.)

  (2) After creating my VLAN interface, nothing happened. No new
  interface appeared. I then realized that I had not installed the
  "vlan" package, and assumed that NetworkManager therefore could not
  complete configuration of the interface.

  (3) After installing the 'vlan' package (and then telling
  NetworkManager to disconnect and reconnect my Ethernet interface from
  the UI, just for good measure), still no VLAN interfaces were present
  on my system.

  I also tried editing the VLAN interface in the UI, and specifying
  "enp4s0f1.100", but still no VLAN interface came online.

  # apt-cache policy network-manager
  network-manager:
    Installed: 1.0.4-0ubuntu6
    Candidate: 1.0.4-0ubuntu6
    Version table:
   *** 1.0.4-0ubuntu6 0
          500 http://172.16.42.88/ubuntu/ xenial/main amd64 Packages
          100 /var/lib/dpkg/status

  # apt-cache policy vlan
  vlan:
    Installed: 1.9-3.2ubuntu1
    Candidate: 1.9-3.2ubuntu1
    Version table:
   *** 1.9-3.2ubuntu1 0
          500 http://172.16.42.88/ubuntu/ xenial/main amd64 Packages
          100 /var/lib/dpkg/status

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