Looks like Juniper is working hard to get their Firefly perimeter usable on Vagrant. See also, the firefly-packer github for info and caveats.

fluong@fluong-ltm:vagrant$ mkdir firefly010
fluong@fluong-ltm:vagrant$ cd firefly010/
fluong@fluong-ltm:firefly010$ ls
fluong@fluong-ltm:firefly010$ vagrant init juniper/ffp-12.1X46-D20.5
A `Vagrantfile` has been placed in this directory. You are now
ready to `vagrant up` your first virtual environment! Please read
the comments in the Vagrantfile as well as documentation on
`vagrantup.com` for more information on using Vagrant.
fluong@fluong-ltm:firefly010$ ls
Vagrantfile
fluong@fluong-ltm:firefly010$ vim Vagrantfile
fluong@fluong-ltm:firefly010$ vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Box 'juniper/ffp-12.1X46-D20.5' could not be found. Attempting to find and install...
    default: Box Provider: virtualbox
    default: Box Version: >= 0
==> default: Loading metadata for box 'juniper/ffp-12.1X46-D20.5'
    default: URL: https://vagrantcloud.com/juniper/ffp-12.1X46-D20.5
==> default: Adding box 'juniper/ffp-12.1X46-D20.5' (v0.1.2) for provider: virtualbox
    default: Downloading: https://vagrantcloud.com/juniper/boxes/ffp-12.1X46-D20.5/versions/3/providers/virtualbox.box
    default: Progress: ##########################################################==> default: Successfully added box 'juniper/ffp-12.1X46-D20.5' (v0.1.2) for 'virtualbox'!
==> default: Importing base box 'juniper/ffp-12.1X46-D20.5'...
==> default: Matching MAC address for NAT networking...
==> default: Checking if box 'juniper/ffp-12.1X46-D20.5' is up to date...
==> default: Setting the name of the VM: firefly010_default_1411482071141_14275
==> default: Clearing any previously set network interfaces...
==> default: Preparing network interfaces based on configuration...
    default: Adapter 1: nat
==> default: Forwarding ports...
    default: 22 => 2222 (adapter 1)
==> default: Booting VM...
==> default: Waiting for machine to boot. This may take a few minutes...
    default: SSH address: 127.0.0.1:2222
    default: SSH username: vagrant
    default: SSH auth method: private key
    default: Warning: Connection timeout. Retrying...
    default: Warning: Connection timeout. Retrying...
    default: Warning: Connection timeout. Retrying...
    default: Warning: Connection timeout. Retrying...
==> default: Machine booted and ready!
==> default: Checking for guest additions in VM...
    default: No guest additions were detected on the base box for this VM! Guest
    default: additions are required for forwarded ports, shared folders, host only
    default: networking, and more. If SSH fails on this machine, please install
    default: the guest additions and repackage the box to continue.
    default:
    default: This is not an error message; everything may continue to work properly,
    default: in which case you may ignore this message.
fluong@fluong-ltm:firefly010$ vagrant ssh
--- JUNOS 12.1X46-D20.5 built 2014-05-14 20:38:10 UTC
vagrant>

vagrant> show interfaces terse
Interface               Admin Link Proto    Local                 Remote
ge-0/0/0                up    up
ge-0/0/0.0              up    up   inet     10.0.2.15/24
gr-0/0/0                up    up
ip-0/0/0                up    up
lsq-0/0/0               up    up
lt-0/0/0                up    up
mt-0/0/0                up    up
sp-0/0/0                up    up
sp-0/0/0.0              up    up   inet
                                   inet6
sp-0/0/0.16383          up    up   inet     10.0.0.1            --> 10.0.0.16
                                            10.0.0.6            --> 0/0
                                            128.0.0.1           --> 128.0.1.16
                                            128.0.0.6           --> 0/0
dsc                     up    up
gre                     up    up
ipip                    up    up
lo0                     up    up
lo0.16384               up    up   inet     127.0.0.1           --> 0/0
lo0.16385               up    up   inet     10.0.0.1            --> 0/0
                                            10.0.0.16           --> 0/0
                                            128.0.0.1           --> 0/0
                                            128.0.0.4           --> 0/0
                                            128.0.1.16          --> 0/0
lo0.32768               up    up
lsi                     up    up
mtun                    up    up
pimd                    up    up
pime                    up    up
pp0                     up    up
ppd0                    up    up
ppe0                    up    up
st0                     up    up
tap                     up    up
vlan                    up    down