landrush is an excellent Vagrant plugin if you are trying to develop or test in a multi-machine VM environment. It works by spinning up a small local DNS server and registering the private network IPs of each machine during
vagrant up so that they can be accessed via their hostname in both the host machine as well as the other guest machines. A great bonus of using landrush is that the VMs can be defined in separate Vagrantfiles (e.g. if you have separate git repos for building different machines).
vagrant landrush status- show whether the DNS server