Enforce Vagrant versions for running your vagrant file.

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|

  vagrant_version = Vagrant::VERSION.sub(/^v/, '')
  if vagrant_version < "1.3.0"
    abort(sprintf("You need to have at least v1.3.0 of vagrant installed. You are currently using v%s", vagrant_version));
  end
  
  # etc...
end