unable to run multiple vagrant instances of ubuntu/xenial64 box

The Vagrantfile INSIDE the virtualbox.box comes with some definitions that i guess shouldn't be there.

Here is the Vagrantfile from Trusty x Xenial

== Trusty ==

➜ boxes cat ubuntu-VAGRANTSLASH-trusty64/20160323.1.0/virtualbox/Vagrantfile
Vagrant::Config.run do |config|
  # This Vagrantfile is auto-generated by 'vagrant package' to contain
  # the MAC address of the box. Custom configuration should be placed in
  # the actual 'Vagrantfile' in this box.
  config.vm.base_mac = "0800278856E6"
end

# Load include vagrant file if it exists after the auto-generated
# so it can override any of the settings
include_vagrantfile = File.expand_path("../include/_Vagrantfile", __FILE__)
load include_vagrantfile if File.exist?(include_vagrantfile)

== Xenial ==
➜ boxes cat ubuntu-VAGRANTSLASH-xenial64/20160411.0.0/virtualbox/Vagrantfile
# Front load the includes
include_vagrantfile = File.expand_path("../include/_Vagrantfile", __FILE__)
load include_vagrantfile if File.exist?(include_vagrantfile)

Vagrant.configure("2") do |config|
  config.vm.base_mac = "020E47A5C995"
  config.ssh.username = "ubuntu"
  config.ssh.password = "7f63355c16f325d44b440caa"
  config.vm.synced_folder '.', '/vagrant', disabled: true

  config.vm.provider "virtualbox" do |vb|
     vb.name = "ubuntu-xenial-16.04-cloudimg"
     vb.customize [ "modifyvm", :id, "--uart1", "0x3F8", "4" ]
     vb.customize [ "modifyvm", :id, "--uartmode1", "file", File.join(Dir.pwd, "%s-console.log" % vb.name) ]
  end
end

You can try adding this to your Vagrantfile for now:

     v.customize ["modifyvm", :id, "--name", "your-custom-name"]

This issue also breaks Vagrant Multi-Machine configuration: https://www.vagrantup.com/docs/multi-machine/

This box has a really invalid vagrant configuration. The username and password needs to change and it needs to follow the guidelines for being a vagrant box.

Seems confirmed via multiple bug reports on the Vagrant side including https://github.com/mitchellh/vagrant/issues/7389

Can you simply remove the whole configure section from the Vagrantfile? Like the trusty box?

And of course, add the vagrant default insecure key to the authorized keys.

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA6NF8iallvQVp22WDkTkyrtvp9eWW6A8YVr+kz4TjGYe7gHzIw+niNltGEFHzD8+v1I2YJ6oXevct1YeS0o9HZyN1Q9qgCgzUFtdOKLv6IedplqoPkcmF0aYet2PkEDo3MlTBckFXPITAMzF8dJSIFo9D8HfdOV0IAdx4O7PtixWKn5y2hMNG0zQPyUecp4pzC6kivAIhyfHilFR61RGL+GPXQ2MWZWFYbAGjyiYJnAmCP3NOTd0jMZEnDkbUvxhMmBYSdETk1rRgm+R4LOzFUGaHqHDLKLX+FIPKcF96hrucXzcWyLbIbEgE98OHlnVYCzRdK8jlqm8tehUc9c9WhQ== vagrant insecure public key