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-.. _configuration-overview:
-
-######################
-Configuration Overview
-######################
-
-VyOS makes use of a unified configuration file for the entire system's
-configuration: ``/config/config.boot``. This allows easy template
-creation, backup, and replication of system configuration. A system can
-thus also be easily cloned by simply copying the required configuration
-files.
-
-Terminology
-===========
-live
-A VyOS system has three major types of configurations:
-
-* **Active** or **running configuration** is the system configuration
-  that is loaded  and currently active (used by VyOS). Any change in
-  the configuration will have to be committed to belong to the
-  active/running configuration.
-
-* **Working configuration** is the one that is currently being modified
-  in configuration mode. Changes made to the working configuration do
-  not go into effect until the changes are committed with the
-  :cfgcmd:`commit` command. At which time the working configuration will
-  become the active or running configuration.
-
-* **Saved configuration** is the one saved to a file using the
-  :cfgcmd:`save` command. It allows you to keep safe a configuration for
-  future uses. There can be multiple configuration files. The default or
-  "boot" configuration is saved and loaded from the file
-  ``/config/config.boot``.
-
-Seeing and navigating the configuration
-=======================================
-
-.. opcmd:: show configuration
-
-   View the current active configuration, also known as the running
-   configuration, from the operational mode.
-
-   .. code-block:: none
-
-     vyos@vyos:~$ show configuration
-     interfaces {
-         ethernet eth0 {
-             address dhcp
-             hw-id 00:53:00:00:aa:01
-         }
-         loopback lo {
-         }
-     }
-     service {
-         ssh {
-             port 22
-         }
-     }
-     system {
-         config-management {
-             commit-revisions 20
-         }
-         console {
-             device ttyS0 {
-                 speed 9600
-             }
-         }
-         login {
-             user vyos {
-                 authentication {
-                     encrypted-password ****************
-                 }
-                 level admin
-             }
-         }
-         ntp {
-             server 0.pool.ntp.org {
-             }
-             server 1.pool.ntp.org {
-             }
-             server 2.pool.ntp.org {
-             }
-         }
-         syslog {
-             global {
-                 facility all {
-                     level notice
-                 }
-                 facility protocols {
-                     level debug
-                 }
-             }
-         }
-     }
-
-By default, the configuration is displayed in a hierarchy like the above
-example, this is only one of the possible ways to display the
-configuration. When the configuration is generated and the device is
-configured, changes are added through a collection of :cfgcmd:`set` and
-:cfgcmd:`delete` commands.
-
-.. opcmd:: show configuration commands
-
-   Get a collection of all the set commands required which led to the
-   running configuration.
-
-   .. code-block:: none
-
-     vyos@vyos:~$ show configuration commands
-     set interfaces ethernet eth0 address 'dhcp'
-     set interfaces ethernet eth0 hw-id '00:53:dd:44:3b:0f'
-     set interfaces loopback 'lo'
-     set service ssh port '22'
-     set system config-management commit-revisions '20'
-     set system console device ttyS0 speed '9600'
-     set system login user vyos authentication encrypted-password '$6$Vt68...QzF0'
-     set system login user vyos level 'admin'
-     set system ntp server '0.pool.ntp.org'
-     set system ntp server '1.pool.ntp.org'
-     set system ntp server '2.pool.ntp.org'
-     set system syslog global facility all level 'notice'
-     set system syslog global facility protocols level 'debug'
-
-Both these ``show`` commands should be executed when in operational
-mode, they do not work directly in configuration mode. There is a
-special way on how to :ref:`run_opmode_from_config_mode`.
-
-.. hint:: Use the ``show configuration commands | strip-private``
-   command when you want to hide private data. You may want to do so if
-   you want to share your configuration on the `forum`_.
-
-.. _`forum`: https://forum.vyos.io
-
-
-The config mode
----------------
-
-When entering the configuration mode you are navigating inside a tree
-structure, to enter configuration mode enter the command
-:opcmd:`configure` when in operational mode.
-
-.. code-block:: none
-
-  vyos@vyos$ configure
-  [edit]
-  vyos@vyos#
-
-
-.. note:: When going into configuration mode, prompt changes from
-   ``$`` to ``#``.
-
-
-All commands executed here are relative to the configuration level you
-have entered. You can do everything from the top level, but commands
-will be quite lengthy when manually typing them.
-
-The current hierarchy level can be changed by the :cfgcmd:`edit`
-command.
-
-.. code-block:: none
-
-  [edit]
-  vyos@vyos# edit interfaces ethernet eth0
-
-  [edit interfaces ethernet eth0]
-  vyos@vyos#
-
-You are now in a sublevel relative to ``interfaces ethernet eth0``, all
-commands executed from this point on are relative to this sublevel. Use
-eithe the :cfgcmd:`top` or :cfgcmd:`exit` command to go back to the top
-of the hierarchy. You can also use the :cfgcmd:`up` command to move only
-one level up at a time.
-
-.. cfgcmd:: show
-
-The :cfgcmd:`show` command within configuration mode will show the
-working configuration indicating line changes with ``+`` for additions,
-``>`` for replacements and ``-`` for deletions.
-
-**Example:**
-
-.. code-block:: none
-
- vyos@vyos:~$ configure
- [edit]
- vyos@vyos# show interfaces
-  ethernet eth0 {
-      description MY_OLD_DESCRIPTION
-      disable
-      hw-id 00:53:dd:44:3b:03
-  }
-  loopback lo {
-  }
- [edit]
- vyos@vyos# set interfaces ethernet eth0 address dhcp
- [edit]
- vyos@vyos# set interfaces ethernet eth0 description MY_NEW_DESCRIPTION
- [edit]
- vyos@vyos# delete interfaces ethernet eth0 disable
- [edit]
- vyos@vyos# show interfaces
-  ethernet eth0 {
- +    address dhcp
- >    description MY_NEW_DESCRIPTION
- -    disable
-      hw-id 00:53:dd:44:3b:03
-  }
-  loopback lo {
-  }
-
-It is also possible to display all `set` commands within configuration
-mode using :cfgcmd:`show | commands`
-
-.. code-block:: none
-
-  vyos@vyos# show interfaces ethernet eth0 | commands
-  set address dhcp
-  set hw-id 00:53:ad:44:3b:03
-
-These commands are also relative to the level you are inside and only 
-relevant configuration blocks will be displayed when entering a
-sub-level.
-
-.. code-block:: none
-
-  [edit interfaces ethernet eth0]
-  vyos@vyos# show
-   address dhcp
-   hw-id 00:53:ad:44:3b:03
-
-Exiting from the configuration mode is done via the :cfgcmd:`exit`
-command from the top level, executing :cfgcmd:`exit` from within a
-sub-level takes you back to the top level.
-
-.. code-block:: none
-
-  [edit interfaces ethernet eth0]
-  vyos@vyos# exit
-  [edit]
-  vyos@vyos# exit
-  Warning: configuration changes have not been saved.
-
-
-Editing the configuration
-=========================
-
-The configuration can be edited by the use of :cfgcmd:`set` and
-:cfgcmd:`delete` commands from within configuration mode.
-
-.. cfgcmd:: set
-
-   Use this command to set the value of a parameter or to create a new
-   element.
-
-Configuration commands are flattened from the tree into 'one-liner'
-commands shown in :opcmd:`show configuration commands` from operation
-mode. Commands are relative to the level where they are executed and all
-redundant information from the current level is removed from the command
-entered.
-
-.. code-block:: none
-
-  [edit]
-  vyos@vyos# set interface ethernet eth0 address 192.0.2.100/24
-
-
-.. code-block:: none
-
-  [edit interfaces ethernet eth0]
-  vyos@vyos# set address 203.0.113.6/24
-
-
-These two commands above are essentially the same, just executed from
-different levels in the hierarchy.
-
-.. cfgcmd:: delete
-
-   To delete a configuration entry use the :cfgcmd:`delete` command,
-   this also deletes all sub-levels under the current level you've
-   specified in the :cfgcmd:`delete` command. Deleting an entry will
-   also result in the element reverting back to its default value if one
-   exists.
-
-   .. code-block:: none
-
-     [edit interfaces ethernet eth0]
-     vyos@vyos# delete address 192.0.2.100/24
-
-.. cfgcmd:: commit
-
-  Any change you do on the configuration, will not take effect until
-  committed using the :cfgcmd:`commit` command in configuration mode.
-
-  .. code-block:: none
-
-    vyos@vyos# commit
-    [edit]
-    vyos@vyos# exit
-    Warning: configuration changes have not been saved.
-    vyos@vyos:~$
-
-.. _save:
-
-.. cfgcmd:: save
-
-   Use this command to preserve configuration changes upon reboot. By
-   default it is stored at */config/config.boot*. In the case you want
-   to store the configuration file somewhere else, you can add a local
-   path, an SCP address, an FTP address or a TFTP address. 
-
-   .. code-block:: none
-
-     vyos@vyos# save
-     Saving configuration to '/config/config.boot'...
-     Done
-
-   .. code-block:: none
-
-     vyos@vyos# save [tab]
-     Possible completions:
-       <Enter>       Save to system config file
-       <file>        Save to file on local machine
-       scp://<user>:<passwd>@<host>:/<file> Save to file on remote machine
-       ftp://<user>:<passwd>@<host>/<file> Save to file on remote machine
-       tftp://<host>/<file>      Save to file on remote machine
-     vyos@vyos# save tftp://192.168.0.100/vyos-test.config.boot
-     Saving configuration to 'tftp://192.168.0.100/vyos-test.config.boot'...
-     ######################################################################## 100.0%
-     Done
-
-.. cfgcmd:: exit [discard]
-
-   Configuration mode can not be exited while uncommitted changes exist.
-   To exit configuration mode without applying changes, the
-   :cfgcmd:`exit discard` command must be used.
-
-   All changes in the working config will thus be lost.
-
-   .. code-block:: none
-
-     vyos@vyos# exit
-     Cannot exit: configuration modified.
-     Use 'exit discard' to discard the changes and exit.
-     [edit]
-     vyos@vyos# exit discard
-
-
-.. cfgcmd:: commit-confirm <minutes>
-
-   Use this command to temporarily commit your changes and set the
-   number of minutes available for validation. ``confirm`` must
-   be entered within those minutes, otherwise the system will reboot
-   into the previous configuration. The default value is 10 minutes.
-
-
-   What if you are doing something dangerous? Suppose you want to setup
-   a firewall, and you are not sure there are no mistakes that will lock
-   you out of your system. You can use confirmed commit. If you issue
-   the ``commit-confirm`` command, your changes will be commited, and if
-   you don't issue issue the ``confirm`` command in 10 minutes, your
-   system will reboot into previous config revision.
-
-   .. code-block:: none
-   
-      vyos@router# set interfaces ethernet eth0 firewall local name FromWorld
-      vyos@router# commit-confirm 
-      commit confirm will be automatically reboot in 10 minutes unless confirmed
-      Proceed? [confirm]y
-      [edit]
-      vyos@router# confirm 
-      [edit]
-
-
-   .. note:: A reboot because you did not enter ``confirm`` will not
-      take you necessarily to the *saved configuration*, but to the
-      point before the unfortunate commit.
-
-
-.. cfgcmd:: copy
-
-   Copy a configuration element.
-
-   You can copy and remove configuration subtrees. Suppose you set up a
-   firewall ruleset ``FromWorld`` with one rule that allows traffic from
-   specific subnet. Now you want to setup a similar rule, but for
-   different subnet. Change your edit level to
-   ``firewall name FromWorld`` and use ``copy rule 10 to rule 20``, then
-   modify rule 20.
-
-
-   .. code-block:: none
-   
-      vyos@router# show firewall name FromWorld 
-       default-action drop
-       rule 10 {
-           action accept
-           source {
-               address 203.0.113.0/24
-           }
-       }
-      [edit]
-      vyos@router# edit firewall name FromWorld 
-      [edit firewall name FromWorld]
-      vyos@router# copy rule 10 to rule 20
-      [edit firewall name FromWorld]
-      vyos@router# set rule 20 source address 198.51.100.0/24
-      [edit firewall name FromWorld]
-      vyos@router# commit
-      [edit firewall name FromWorld]
-
-
-.. cfgcmd:: rename
-
-   Rename a configuration element.
-
-   You can also rename config subtrees:
-
-   .. code-block:: none
-   
-      vyos@router# rename rule 10 to rule 5
-      [edit firewall name FromWorld]
-      vyos@router# commit
-      [edit firewall name FromWorld]
-
-   Note that ``show`` command respects your edit level and from this
-   level you can view the modified firewall ruleset with just ``show``
-   with no parameters.
-
-   .. code-block:: none
-   
-      vyos@router# show 
-       default-action drop
-       rule 5 {
-           action accept
-           source {
-               address 203.0.113.0/24
-           }
-       }
-       rule 20 {
-           action accept
-           source {
-               address 198.51.100.0/24
-           }
-       }
-
-
-.. cfgcmd:: comment <config node> "comment text"
-
-   Add comment as an annotation to a configuration node.
-
-   The ``comment`` command allows you to insert a comment above the
-   ``<config node>`` configuration section. When shown, comments are
-   enclosed with ``/*`` and ``*/`` as open/close delimiters. Comments
-   need to be commited, just like other config changes.
-
-   To remove an existing comment from your current configuration,
-   specify an empty string enclosed in double quote marks (``""``) as
-   the comment text.
-
-   Example:
-
-   .. code-block:: none
-
-     vyos@vyos# comment firewall all-ping "Yes I know this VyOS is cool"
-     vyos@vyos# commit
-     vyos@vyos# show
-      firewall {
-          /* Yes I know this VyOS is cool */
-          all-ping enable
-          broadcast-ping disable
-          ...
-      }
-
-   .. note:: An important thing to note is that since the comment is
-      added on top of the section, it will not appear if the ``show
-      <section>`` command is used. With the above example, the `show
-      firewall` command would return starting after the ``firewall
-      {`` line, hiding the comment.
-
-
-
-
-   
-
-.. _run_opmode_from_config_mode:
-
-Access opmode from config mode
-==============================
-
-When inside configuration mode you are not directly able to execute
-operational commands.
-
-.. cfgcmd:: run
-
-  Access to these commands are possible through the use of the
-  ``run [command]`` command. From this command you will have access to
-  everything accessible from operational mode.
-
-  Command completion and syntax help with ``?`` and ``[tab]`` will also
-  work.
-
-  .. code-block:: none
-
-    [edit]
-    vyos@vyos# run show interfaces
-    Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
-    Interface        IP Address                        S/L  Description
-    ---------        ----------                        ---  -----------
-    eth0             0.0.0.0/0                         u/u
-
-Managing configurations
-=======================
-
-VyOS comes with an integrated versioning system for the system
-configuration. It automatically maintains a backup of every previous
-configuration which has been committed to the system. The configurations
-are versioned locally for rollback but they can also be stored on a
-remote host for archiving/backup reasons.
-
-Local Archive
--------------
-
-Revisions are stored on disk. You can view, compare and rollback them to
-any previous revisions if something goes wrong.
-
-.. opcmd:: show system commit
-
-   View all existing revisions on the local system.
-
-   .. code-block:: none
-
-     vyos@vyos:~$ show system commit
-     0   2015-03-30 08:53:03 by vyos via cli
-     1   2015-03-30 08:52:20 by vyos via cli
-     2   2015-03-26 21:26:01 by root via boot-config-loader
-     3   2015-03-26 20:43:18 by root via boot-config-loader
-     4   2015-03-25 11:06:14 by root via boot-config-loader
-     5   2015-03-25 01:04:28 by root via boot-config-loader
-     6   2015-03-25 00:16:47 by vyos via cli
-     7   2015-03-24 23:43:45 by root via boot-config-loader
-
-
-.. cfgcmd:: set system config-management commit-revisions <N>
-
-   You can specify the number of revisions stored on disk. N can be in
-   the range of 0 - 65535. When the number of revisions exceeds the
-   configured value, the oldest revision is removed. The default setting
-   for this value is to store 100 revisions locally.
-
-
-Compare configurations
-----------------------
-
-VyOS lets you compare different configurations.
-
-.. cfgcmd:: compare <saved | N> <M>
-
-   Use this command to spot what the differences are between different
-   configurations.
-
-   .. code-block:: none
-
-     vyos@vyos# compare [tab]
-     Possible completions:
-       <Enter>	Compare working & active configurations
-       saved		Compare working & saved configurations
-       <N>		Compare working with revision N
-       <N> <M>	Compare revision N with M
-       Revisions:
-         0	   2013-12-17 20:01:37 root by boot-config-loader
-         1	   2013-12-13 15:59:31 root by boot-config-loader
-         2	   2013-12-12 21:56:22 vyos by cli
-         3	   2013-12-12 21:55:11 vyos by cli
-         4	   2013-12-12 21:27:54 vyos by cli
-         5	   2013-12-12 21:23:29 vyos by cli
-         6	   2013-12-12 21:13:59 root by boot-config-loader
-         7	   2013-12-12 16:25:19 vyos by cli
-         8	   2013-12-12 15:44:36 vyos by cli
-         9	   2013-12-12 15:42:07 root by boot-config-loader
-         10   2013-12-12 15:42:06 root by init
-
-   The command :cfgcmd:`compare` allows you to compare different type of
-   configurations. It also lets you compare different revisions through
-   the :cfgcmd:`compare N M` command, where N and M are revision
-   numbers. The output will describe how the configuration N is when
-   compared to M indicating with a plus sign (``+``) the additional
-   parts N has when compared to M, and indicating with a minus sign
-   (``-``) the lacking parts N misses when compared to M.
-
-   .. code-block:: none
-
-     vyos@vyos# compare 0 6
-     [edit interfaces]
-     +dummy dum1 {
-     +    address 10.189.0.1/31
-     +}
-     [edit interfaces ethernet eth0]
-     +vif 99 {
-     +    address 10.199.0.1/31
-     +}
-     -vif 900 {
-     -    address 192.0.2.4/24
-     -}
-
-
-.. opcmd:: show system commit diff <number>
-
-   Show commit revision difference.
-
-
-The command above also lets you see the difference between two commits.
-By default the difference with the running config is shown.
-
-.. code-block:: none
-
-   vyos@router# run show system commit diff 4
-   [edit system]
-   +ipv6 {
-   +    disable-forwarding
-   +}
-
-This means four commits ago we did ``set system ipv6 disable-forwarding``.
-
-
-Rollback Changes
-----------------
-
-You can rollback configuration changes using the rollback command. This
-will apply the selected revision and trigger a system reboot.
-
-.. cfgcmd:: rollback <N>
-
-   Rollback to revision N (currently requires reboot)
-
-   .. code-block:: none
-
-     vyos@vyos# compare 1
-     [edit system]
-     >host-name vyos-1
-     [edit]
-
-     vyos@vyos# rollback 1
-     Proceed with reboot? [confirm][y]
-     Broadcast message from root@vyos-1 (pts/0) (Tue Dec 17 21:07:45 2013):
-     The system is going down for reboot NOW!
-
-Remote Archive
---------------
-
-VyOS can upload the configuration to a remote location after each call
-to :cfgcmd:`commit`. You will have to set the commit-archive location.
-TFTP, FTP, SCP and SFTP servers are supported. Every time a
-:cfgcmd:`commit` is successfull the ``config.boot`` file will be copied
-to the defined destination(s). The filename used on the remote host will
-be ``config.boot-hostname.YYYYMMDD_HHMMSS``. 
-
-.. cfgcmd:: set system config-management commit-archive location <URI>
-
-   Specify remote location of commit archive as any of the below
-   :abbr:`URI (Uniform Resource Identifier)`
-
-   * ``scp://<user>:<passwd>@<host>:/<dir>``
-   * ``sftp://<user>:<passwd>@<host>/<dir>``
-   * ``ftp://<user>:<passwd>@<host>/<dir>``
-   * ``tftp://<host>/<dir>``
-
-.. note:: The number of revisions don't affect the commit-archive.
-
-.. note:: You may find VyOS not allowing the secure connection because
-   it cannot verify the legitimacy of the remote server. You can use
-   the workaround below to quickly add the remote host's SSH
-   fingerprint to your ``~/.ssh/known_hosts`` file:
-
-   .. code-block:: none
-
-     vyos@vyos# ssh-keyscan <host> >> ~/.ssh/known_hosts
-
-Saving and loading manually
----------------------------
-
-You can use the ``save`` and ``load`` commands if you want to manually
-manage specific configuration files.
-
-When using the save_ command, you can add a specific location where
-to store your configuration file. And, when needed it, you will be able
-to load it with the ``load`` command:
-
-.. cfgcmd:: load <URI>
-
-   Use this command to load a configuration which will replace the
-   running configuration. Define the location of the configuration file
-   to be loaded. You can use a path to a local file, an SCP address, an
-   SFTP address, an FTP address, an HTTP address, an HTTPS address or a
-   TFTP address.
-
-  .. code-block:: none
-
-     vyos@vyos# load 
-     Possible completions:
-       <Enter>				        Load from system config file
-       <file>			        	Load from file on local machine
-       scp://<user>:<passwd>@<host>:/<file>	Load from file on remote machine
-       sftp://<user>:<passwd>@<host>/<file>	Load from file on remote machine
-       ftp://<user>:<passwd>@<host>/<file>	Load from file on remote machine
-       http://<host>/<file>			Load from file on remote machine
-       https://<host>/<file>			Load from file on remote machine
-       tftp://<host>/<file>			Load from file on remote machine
-     
-
-
-Restore Default
----------------
-
-In the case you want to completely delete your configuration and restore
-the default one, you can enter the following command in configuration
-mode:
-
-.. code-block:: none
-
-  load /opt/vyatta/etc/config.boot.default
-
-You will be asked if you want to continue. If you accept, you will have
-to use :cfgcmd:`commit` if you want to make the changes active.
-
-Then you may want to :cfgcmd:`save` in order to delete the saved
-configuration too.
-
-.. note:: If you are remotely connected, you will lose your connection.
-   You may want to copy first the config, edit it to ensure
-   connectivity, and load the edited config.