Vagrantfile that will allow you to have more than one vagrant instance (default). To each instance, you can use all the options available (network, provision, etc, etc)

Vagrantfile

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

# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
  config.vm.define "instance0" do |d|
      d.vm.box = "ubuntu/trusty64"
      d.ssh.shell = "bash -c 'BASH_ENV=/etc/profile exec bash'"
      d.vm.hostname = "NAME"
      d.vm.synced_folder ".", "/vagrant"
      d.vm.network "forwarded_port", guest: 3000, host: 13000

      # Chef config only for dev
      d.vm.provision "chef_client" do |chef|
          chef.chef_server_url = "https://chef.example.com"
          chef.node_name = "NODE_NAME"
          chef.validation_key_path = "/path/to/chef.pem"
          chef.validation_client_name = "USER"
          chef.environment = "development" # Or any other env

          # Run list
          chef.add_role = "development"
      end

  end

  config.vm.define "instance1" do |m|
      m.vm.box = "ubuntu/trusty64"
      m.vm.hostname = "instance1"
      m.vm.provision "shell", path: "/path/to/script.sh"
  end

  config.vm.define "instance2" do |s|
      s.vm.box = "ubuntu/trusty64"
      s.vm.hostname = "instance2"
  end

end