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+.. _migrate_from_vyatta:
+
+Migrate from Vyatta Core
+========================
+
+VyOS 1.x line aims to preserve backward compatibility and provide a safe
+upgrade path for existing Vyatta Core users. You may think of VyOS 1.0.0 as
+VC7.0.
+
+Vyatta release compatibility
+----------------------------
+
+Vyatta Core releases from 6.5 to 6.6 should be 100% compatible.
+
+Vyatta Core 6.4 and earlier may have incompatibilities. In Vyatta 6.5 the
+"modify" firewall was removed and replaced with the ``set policy route``
+command family, old configs can not be automatically converted. You will have
+to adapt it to post-6.5 Vyatta syntax manually.
+
+.. note:: Also, in Vyatta Core 6.5 remote access VPN interfaces have been
+   renamed from ``pppX``  to ``l2tpX`` and ``pptpX``. If you are using
+   zone based firewalling in Vyatta Core pre-6.5 versions, make sure to change
+   interface names in rules for remote access VPN.
+
+Upgrade procedure
+-----------------
+
+You just use ``add system image``, as if it was a new VC release (see
+:ref:`update_vyos` for additional information). The only thing you want to do
+is to verify the new images digital signature. You will have to add the public
+key manually once as it is not shipped the first time.
+
+.. code-block:: none
+
+  vyatta@vyatta:~$ wget http://wiki.vyos.net/so3group_maintainers.key
+  Connecting to vyos.net (x.x.x.x:80)
+  so3group_maintainers 100% |*************************|  3125  --:--:-- ETA
+  vyatta@vyatta:~$ sudo apt-key add so3group_maintainers.key
+  OK
+  vyatta@vyatta:~$
+
+For completion the key below corresponds to the key listed in the URL above.
+
+.. code-block:: none
+
+  -----BEGIN PGP PUBLIC KEY BLOCK-----
+  Version: GnuPG v1.4.12 (GNU/Linux)
+
+  mQINBFIIUZwBEADGl+wkZpYytQxd6LnjDZZScziBKYJbjInetYeS0SUrgpqnPkzL
+  2CiGfPczLwpYY0zWxpUhTvqjFsE5yDpgs0sPXIgUTFE1qfZQE+WD1I1EUM6sp/38
+  2xKQ9QaNc8oHuYINLYYmNYra6ZjIGtQP9WOX//IDYB3fhdwlmiW2z0hux2OnPWdh
+  hPZAmSrx5AiXFEEREJ1cAQyvYk7hgIRvM/rdQMUm+u4/z+S4mxCHE10KzlqOGhRv
+  hA8WQxHCVusMFGwXoKHxYf9OQpV7lsfOCODfXOMP/L9kHQ5/gBsLL5hHst+o/3VG
+  ec0QuVrVkBBehgrqhfJW2noq+9gTooURGImQHEOyE0xpJdFrrgk5Ii9RqQwdVRzI
+  ZPbqbo8uuldZIRJRGnfx+vAR9812yo38NVZ/X0P/hkkrx+UeGVgpC/ao5XLRiOzL
+  7ZBMWLA6FVmZ7mkpqdzuMXX5548ApACm6EKErULIhTYDGDzFxA3cf6gr5VVi4usD
+  wglVs+FHuiLehmuuPTMoVcT2R6+Ht44hG3BmQmKzh/SSEa1g9gKgrhZrMdIyK4hu
+  GvMqLw9z9BgJbWB3BgXOUdlkXLDwBvVpEcWsPJgxSjAvjAbLLE4YkKAdYU8bQ0Pd
+  JuN485tcXxgQCadFZB0gcipQAvVf4b810HrY88g6FldfauHxiACOlXscZwARAQAB
+  tDBTTzMgR3JvdXAgTWFpbnRhaW5lcnMgPG1haW50YWluZXJzQHNvM2dyb3VwLm5l
+  dD6JAjgEEwECACIFAlIIUZwCGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJ
+  ELdE4lqkQubp8GsQAKntoRFG6bWX/4WPw7Vo7kIF5kWcmv3lVb0AQkacscWope7T
+  Iq0VcgpAycJue2bSS9LAsvNtpVkQmFawbwFjqB3CC5NbPNQ4Kf+gswKa+yaHwejo
+  7dkslAwxgXHe5g76DG7CVLMsMg6zVDFYuzeksPywls/OJBIpkuGqeXy9tAHjQzjA
+  SlZV3Gsx7azESjiVQ73EUBt2OXkwN4TN9TEHAnVsrNIXHwFl1VfFsSG1Q6uZDtkk
+  CB4DZJKN4RzCY2QSwMAqRRC2OXdwk5IAk8wwCGoFpp0UV6CO9YCeOaqJderEcBA4
+  MGHqdiPDIbH5wvckjZzFznU/Paz3MwPwBdtN+WSKvwf+JItSiUqm8Dy2Pl/1cnux
+  1g1I4WQlXUVaS/MDusqL7tbS8k5A5a2+YVMxShWH9BhXZwNXzEihl4sm8Hrg5SvZ
+  givJj2y93WoL69Wq0/86wkkH2xcrz4gsiUcQf5YXU/RHXOLnPR29/pg8TS0L7sST
+  dv0X23C2IpfqYoqN7YZ3K0Wczhi0yLPCrc27IczuHgjt/8ICda11xhB1t/pUbvnX
+  oksehaLp8O3uU8GyAsTfUgpijZFc/3jIadOl0L9NGUbYYgPzFeaZTa/njeEbz3wX
+  PZMn278sbL9UhupI5Hx7eREbKzV4VPVKz81ndKNMXyuJHXv2R0xou3nvuo1WuQIN
+  BFIIUZwBEADAhoYPDCSogG41Naq+wFkG+IPszqe0dW/UWg0xrZDT0UblwDSd4OGY
+  7FATMIhjOUyFxk6+XKA5CDCWP8Npkl0modTL59uVWNxU1vUKincc/j4ipHQeAhE6
+  fvZkrprvADD8TYIGesl/3EGNc7bzc5ZqX71hKPHG+autRtgFSOR2PSXD9MlJXIBb
+  RzHAXxlh72zvsGadcxLJm4pSWXitkR/5Wc3e0IippKdzGwZnCDpNmcBGtSTFgixP
+  JqyRZFVCPWs7jr/oQeZnq65wJp1KD2HvhhKHJfsPrnNjLSm1SQVh8hXzE9odcv6N
+  mJB7tNXywuROBt6a01ojBa9J3zuMYQj3iQl2MhxtHylKVBjr7NjZ4evZbLsRMxY1
+  hYk7sl+ZxCPFeOZ9D2ppU/CUDXCS095I1x+s+VuiUNf/3yd8ahCWDXVp9nsXyYjm
+  2pHIxb2F6r8Vd4AjlD2MQwszECS88INF3l/9ksIHEMKuuW+JAC9FiZ7k4IGcIltv
+  If/V2TgE6t6qoWIlmLhMTjOyJpwnokY1nIuXHH7yp+HsuqnYnf/dgLnt4czPLeHO
+  +TdIDHhUym0AKlCcbdgn0C6EJVTnA8BFgFjiIOMAeT0rhATg0W/cND8KQcX4V9wM
+  nHSEsgSEuP9H+67xuRx5Imuh5ntecrcuCYSNuOneUXWPThDKQPO9lQARAQABiQIf
+  BBgBAgAJBQJSCFGcAhsMAAoJELdE4lqkQubpc+0P/0IzUx8nTpF0/ii2TA0YCOgj
+  tviM6PRTVPrFcxijNeXiIMHZYrALYUvXxXGp1IZBP3IcOyuZNp2WLqF/f9a3cIr1
+  9b/LJPrwopGqV3K30lormk7hH0s3IXbhd0ZYWvRj+5kQ8TFRAFfPwjlItzjYJmYX
+  AGJmM9PxJID/4LgWSfQ/ZfNu7MJ7+2goQLu9b6x7UC1FlE4q1lcjBvHjVPM//S9G
+  lGAHaysyTjVu88W2wwBpBrO1MQnDvqFRddXPOIWp0jecBMUd4E0fB36yuStsXZT3
+  RN4V8vKRBYXuqHhiTwZeh153cHZk2EZBwz5A6DJubMaGdJTesHW5Qf2goph0pmjC
+  +XuXn8J6tc5nFDf8DP4AFVMtqa3Brj2fodWd0Zzxq3AVsbX144c1oqJUhO4t3+ie
+  8fD/6/jx4iuPCQTfyhHG+zGfyUb2LQ+OVLW1WYTxH5tzHaZUmZFdV2I1kuhuvZ1t
+  WRlmTnHZOnEb3+t8KCRWzRMfweTzXfRRKBC0/QpeX1r5pbaMHH8zF/J5PKmL0+jg
+  +DS8JSbSfv7Ke6rplf7lHYaDumAFZfxXuQkajzLZbX0E5Xu5BNz4Vq6LGBj7LDXL
+  gswIK8FFgZB+W8zwOqUV1vjIr9wkdLifXXezKpTeYpFDGLdfsK+uNAtGyvI61TDi
+  Pr6fWpIruuc7Gg9rUF0L
+  =VQTr
+  -----END PGP PUBLIC KEY BLOCK-----
+
+Next add the VyOS image.
+
+This example uses VyOS 1.0.0, however, it's better to install the latest
+release.
+
+.. code-block:: none
+
+  vyatta@vyatta:~$ show system image
+  The system currently has the following image(s) installed:
+    1: VC6.6R1 (default boot) (running image)
+
+  vyatta@vyatta:~$ add system image https://downloads.vyos.io/release/legacy/1.0.0/vyos-1.0.0-amd64.iso
+   Trying to fetch ISO file from https://downloads.vyos.io/release/legacy/1.0.0/vyos-1.0.0-amd64.iso
+     % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                    Dload  Upload   Total   Spent    Left  Speed
+   100  223M  100  223M    0     0   960k      0  0:03:57  0:03:57 --:--:--  657k
+   ISO download succeeded.
+   Checking for digital signature file...
+     % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                    Dload  Upload   Total   Spent    Left  Speed
+   100   836  100   836    0     0   4197      0 --:--:-- --:--:-- --:--:--  4287
+   Found it.  Checking digital signature...
+   gpg: directory `/root/.gnupg' created
+   gpg: new configuration file `/root/.gnupg/gpg.conf' created
+   gpg: WARNING: options in `/root/.gnupg/gpg.conf' are not yet active during this run
+   gpg: keyring `/root/.gnupg/pubring.gpg' created
+   gpg: Signature made Sun Dec 22 16:51:42 2013 GMT using RSA key ID A442E6E9
+   gpg: /root/.gnupg/trustdb.gpg: trustdb created
+   gpg: Good signature from "SO3 Group Maintainers <maintainers@so3group.net>"
+   gpg: WARNING: This key is not certified with a trusted signature!
+   gpg:          There is no indication that the signature belongs to the owner.
+   Primary key fingerprint: DD5B B405 35E7 F6E3 4278  1ABF B744 E25A A442 E6E9
+   Digital signature is valid.
+   Checking MD5 checksums of files on the ISO image...OK.
+   Done!
+
+   What would you like to name this image? [1.0.0]: [return]
+   OK.  This image will be named: 1.0.0
+   Installing "1.0.0" image.
+   Copying new release files...
+
+   Would you like to save the current configuration
+   directory and config file? (Yes/No) [Yes]: [return]
+   Copying current configuration...
+
+   Would you like to save the SSH host keys from your
+   current configuration? (Yes/No) [Yes]: [return]
+   Copying SSH keys...
+   Setting up grub configuration...
+   Done.
+
+   vyatta@vyatta:~$ show system image
+   The system currently has the following image(s) installed:
+
+      1: 1.0.0 (default boot)
+      2: VC6.6R1 (running image)
+
+Upon reboot, you should have a working installation of VyOS.
+
+You can go back to your Vyatta install using the ``set system image
+default-boot`` command and selecting the your previous Vyatta Core image.
+
+.. note:: Future releases of VyOS will break the direct upgrade path from
+   Vyatta core. Please upgrade through an intermediate VyOS version e.g. VyOS
+   1.2. After this you can continue upgrading to newer releases once you bootet
+   into VyOS 1.2 once.