title: Vagrant cannot forward the specified ports on this VM
body: <p>I have Vagrant in use for one box profile. Now I want to use Vagrant for another box (b2), but it says that bioiq's instance is consuming the forwarded port 2222 (which it is). </p>
  
  <p>Now, if I configure b2 with the below, Vagrant still tries to use 2222.</p>
  
  <pre><code>Vagrant.configure("2") do |config|
  
    config.vm.box = 'precise32'
    config.vm.box_url = 'http://files.vagrantup.com/precise32.box'
  
    config.vm.network :forwarded_port, guest: 22, host: 2323
  
    # Neither of these fix my problem 
    # config.vm.network :private_network, type: :dhcp 
    # config.vm.network :private_network, ip: "10.0.0.200"
  end
  </code></pre>
  
  <p>I've tried various ways from other SO questions to set the <strong><em>:forwarded_port</em></strong> (see <a href="https://stackoverflow.com/questions/10953070/how-to-debug-vagrant-cannot-forward-the-specified-ports-on-this-vm-message">here</a> and <a href="https://stackoverflow.com/questions/20530203/portforwarding-for-multiple-vms-using-same-port-forwarding-rules">here</a>). I also tried this <a href="https://groups.google.com/forum/#!topic/vagrant-up/HwqFegoCXOc" rel="noreferrer">Google Group post</a>, to no avail. I keep getting this message. </p>
  
  <pre><code>Vagrant cannot forward the specified ports on this VM, since they
  would collide with some other application that is already listening
  on these ports. The forwarded port to 2222 is already in use
  on the host machine.
  
  To fix this, modify your current projects Vagrantfile to use another
  port. Example, where '1234' would be replaced by a unique host port:
  
    config.vm.network :forwarded_port, guest: 22, host: 1234
  
  Sometimes, Vagrant will attempt to auto-correct this for you. In this
  case, Vagrant was unable to. This is usually because the guest machine
  is in a state which doesn't allow modifying port forwarding.
  </code></pre>
  
  <p>I don't know why Vagrant consistently ignores my directives. The posted configuration doesn't work. Has anyone overcome this? </p>