Replace whitelist with allowlist
[netconf.git] / docs / user-guide.rst
index da4f92a99e59a6ac08e6806cf9e9827248a0af5f..360db6918120cd5d41d9db39b7de7a6d549fe329 100644 (file)
@@ -41,7 +41,7 @@ In terms of RFCs, the connector supports:
 
 -  `RFC-6022 <https://tools.ietf.org/html/rfc6022>`__
 
--  `draft-ietf-netconf-yang-library-06 <https://tools.ietf.org/html/draft-ietf-netconf-yang-library-06>`__
+-  `RFC-7895 <https://tools.ietf.org/html/rfc7895>`__
 
 **Netconf-connector is fully model-driven (utilizing the YANG modeling
 language) so in addition to the above RFCs, it supports any
@@ -56,24 +56,20 @@ the device.**
 Netconf-connector configuration
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-There are 2 ways for configuring netconf-connector: NETCONF or RESTCONF.
-This guide focuses on using RESTCONF.
+NETCONF connectors are configured directly through the usage of the
+network-topology model. You can configure new NETCONF connectors both
+through the NETCONF server for MD-SAL (port 2830) or RESTCONF. This guide
+focuses on RESTCONF.
 
 .. important::
 
-    There are 2 different endpoints related to RESTCONF protocols:
-
-    - | ``http://localhost:8181/restconf`` is related to `draft-bierman-netconf-restconf-02 <https://tools.ietf.org/html/draft-bierman-netconf-restconf-02>`__,
-      | can be activated by installing ``odl-restconf-nb-bierman02``
-       Karaf feature.
-      | This user guide uses this approach.
+    Since 2022.09 Chlorine there is only one RESTCONF endpoint:
 
     - | ``http://localhost:8181/rests`` is related to `RFC-8040 <https://tools.ietf.org/html/rfc8040>`__,
-      | can be activated by installing ``odl-restconf-nb-rfc8040``
+      | can be activated by installing ``odl-restconf-nb``
        Karaf feature.
 
-    | In case of `RFC-8040 <https://tools.ietf.org/html/rfc8040>`__
-     resources for configuration and operational datastores start
+    | Resources for configuration and operational datastores start
      ``/rests/data/``,
     | e. g. GET
      http://localhost:8181/rests/data/network-topology:network-topology
@@ -86,8 +82,7 @@ This guide focuses on using RESTCONF.
      http://localhost:8181/rests/data/network-topology:network-topology?content=nonconfig
      for operational datastore.
 
-    | Also in case of `RFC-8040 <https://tools.ietf.org/html/rfc8040>`__,
-     if a data node in the path expression is a YANG leaf-list or list
+    | Also if a data node in the path expression is a YANG leaf-list or list
      node, the path segment has to be constructed by having leaf-list or
      list node name, followed by an "=" character, then followed by the
      leaf-list or list value. Any reserved characters must be
@@ -95,272 +90,7 @@ This guide focuses on using RESTCONF.
     | e. g. GET
      http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf?content=config
      for retrieving data from configuration datastore for
-     topology-netconf value of topology list is equivalent to the deprecated request
-    | |ss| GET |se|
-     http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf,
-     which is related to `draft-bierman-netconf-restconf-02
-     <https://tools.ietf.org/html/draft-bierman-netconf-restconf-02>`__.
-
-    Examples in the `Spawning new NETCONF connectors`_ section include both bierman02 and rfc8040
-    formats
-
-
-Default configuration
-^^^^^^^^^^^^^^^^^^^^^
-
-The default configuration contains all the necessary dependencies (file:
-01-netconf.xml) and a single instance of netconf-connector (file:
-99-netconf-connector.xml) called **controller-config** which connects
-itself to the NETCONF northbound in OpenDaylight in a loopback fashion.
-The connector mounts the NETCONF server for config-subsystem in order to
-enable RESTCONF protocol for config-subsystem. This RESTCONF still goes
-via NETCONF, but using RESTCONF is much more user friendly than using
-NETCONF.
-
-Spawning additional netconf-connectors while the controller is running
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-Preconditions:
-
-1. OpenDaylight is running
-
-2. In Karaf, you must have the netconf-connector installed (at the Karaf
-   prompt, type: ``feature:install odl-netconf-connector-all``); the
-   loopback NETCONF mountpoint will be automatically configured and
-   activated
-
-3. Wait until log displays following entry:
-   RemoteDevice{controller-config}: NETCONF connector initialized
-   successfully
-
-To configure a new netconf-connector you need to send following request
-to RESTCONF:
-
-POST
-http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/controller-config/yang-ext:mount/config:modules
-
-Headers:
-
--  Accept application/xml
-
--  Content-Type application/xml
-
-::
-
-    <module xmlns="urn:opendaylight:params:xml:ns:yang:controller:config">
-      <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">prefix:sal-netconf-connector</type>
-      <name>new-netconf-device</name>
-      <address xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">127.0.0.1</address>
-      <port xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">830</port>
-      <username xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">admin</username>
-      <password xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">admin</password>
-      <tcp-only xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">false</tcp-only>
-      <event-executor xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:netty">prefix:netty-event-executor</type>
-        <name>global-event-executor</name>
-      </event-executor>
-      <binding-registry xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:binding">prefix:binding-broker-osgi-registry</type>
-        <name>binding-osgi-broker</name>
-      </binding-registry>
-      <dom-registry xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:dom">prefix:dom-broker-osgi-registry</type>
-        <name>dom-broker</name>
-      </dom-registry>
-      <client-dispatcher xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:config:netconf">prefix:netconf-client-dispatcher</type>
-        <name>global-netconf-dispatcher</name>
-      </client-dispatcher>
-      <processing-executor xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:threadpool">prefix:threadpool</type>
-        <name>global-netconf-processing-executor</name>
-      </processing-executor>
-      <keepalive-executor xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:threadpool">prefix:scheduled-threadpool</type>
-        <name>global-netconf-ssh-scheduled-executor</name>
-      </keepalive-executor>
-    </module>
-
-This spawns a new netconf-connector which tries to connect to (or mount)
-a NETCONF device at 127.0.0.1 and port 830. You can check the
-configuration of config-subsystem’s configuration datastore. The new
-netconf-connector will now be present there. Just invoke:
-
-GET
-http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/controller-config/yang-ext:mount/config:modules
-
-The response will contain the module for new-netconf-device.
-
-Right after the new netconf-connector is created, it writes some useful
-metadata into the datastore of MD-SAL under the network-topology
-subtree. This metadata can be found at:
-
-GET
-http://localhost:8181/restconf/operational/network-topology:network-topology/
-
-Information about connection status, device capabilities, etc. can be
-found there.
-
-Connecting to a device not supporting NETCONF monitoring
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-The netconf-connector in OpenDaylight relies on ietf-netconf-monitoring
-support when connecting to remote NETCONF device. The
-ietf-netconf-monitoring support allows netconf-connector to list and
-download all YANG schemas that are used by the device. NETCONF connector
-can only communicate with a device if it knows the set of used schemas
-(or at least a subset). However, some devices use YANG models internally
-but do not support NETCONF monitoring. Netconf-connector can also
-communicate with these devices, but you have to side load the necessary
-yang models into OpenDaylight’s YANG model cache for netconf-connector.
-In general there are 2 situations you might encounter:
-
-**1. NETCONF device does not support ietf-netconf-monitoring but it does
-list all its YANG models as capabilities in HELLO message**
-
-This could be a device that internally uses only ietf-inet-types YANG
-model with revision 2010-09-24. In the HELLO message that is sent from
-this device there is this capability reported:
-
-::
-
-    urn:ietf:params:xml:ns:yang:ietf-inet-types?module=ietf-inet-types&revision=2010-09-24
-
-**For such devices you only need to put the schema into folder
-cache/schema inside your Karaf distribution.**
-
-.. important::
-
-    The file with YANG schema for ietf-inet-types has to be called
-    ietf-inet-types@2010-09-24.yang. It is the required naming format of
-    the cache.
-
-**2. NETCONF device does not support ietf-netconf-monitoring and it does
-NOT list its YANG models as capabilities in HELLO message**
-
-Compared to device that lists its YANG models in HELLO message, in this
-case there would be no capability with ietf-inet-types in the HELLO
-message. This type of device basically provides no information about the
-YANG schemas it uses so its up to the user of OpenDaylight to properly
-configure netconf-connector for this device.
-
-Netconf-connector has an optional configuration attribute called
-yang-module-capabilities and this attribute can contain a list of "YANG
-module based" capabilities. So by setting this configuration attribute,
-it is possible to override the "yang-module-based" capabilities reported
-in HELLO message of the device. To do this, we need to modify the
-configuration of netconf-connector by adding this XML (It needs to be
-added next to the address, port, username etc. configuration elements):
-
-::
-
-    <yang-module-capabilities xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-      <capability xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        urn:ietf:params:xml:ns:yang:ietf-inet-types?module=ietf-inet-types&amp;revision=2010-09-24
-      </capability>
-    </yang-module-capabilities>
-
-**Remember to also put the YANG schemas into the cache folder.**
-
-.. note::
-
-    For putting multiple capabilities, you just need to replicate the
-    capability xml element inside yang-module-capability element.
-    Capability element is modeled as a leaf-list. With this
-    configuration, we would make the remote device report usage of
-    ietf-inet-types in the eyes of netconf-connector.
-
-Reconfiguring Netconf-Connector While the Controller is Running
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-It is possible to change the configuration of a running module while the
-whole controller is running. This example will continue where the last
-left off and will change the configuration for the brand new
-netconf-connector after it was spawned. Using one RESTCONF request, we
-will change both username and password for the netconf-connector.
-
-To update an existing netconf-connector you need to send following
-request to RESTCONF:
-
-PUT
-http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/controller-config/yang-ext:mount/config:modules/module/odl-sal-netconf-connector-cfg:sal-netconf-connector/new-netconf-device
-
-::
-
-    <module xmlns="urn:opendaylight:params:xml:ns:yang:controller:config">
-      <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">prefix:sal-netconf-connector</type>
-      <name>new-netconf-device</name>
-      <username xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">bob</username>
-      <password xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">passwd</password>
-      <tcp-only xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">false</tcp-only>
-      <event-executor xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:netty">prefix:netty-event-executor</type>
-        <name>global-event-executor</name>
-      </event-executor>
-      <binding-registry xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:binding">prefix:binding-broker-osgi-registry</type>
-        <name>binding-osgi-broker</name>
-      </binding-registry>
-      <dom-registry xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:dom">prefix:dom-broker-osgi-registry</type>
-        <name>dom-broker</name>
-      </dom-registry>
-      <client-dispatcher xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:config:netconf">prefix:netconf-client-dispatcher</type>
-        <name>global-netconf-dispatcher</name>
-      </client-dispatcher>
-      <processing-executor xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:threadpool">prefix:threadpool</type>
-        <name>global-netconf-processing-executor</name>
-      </processing-executor>
-      <keepalive-executor xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
-        <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:threadpool">prefix:scheduled-threadpool</type>
-        <name>global-netconf-ssh-scheduled-executor</name>
-      </keepalive-executor>
-    </module>
-
-Since a PUT is a replace operation, the whole configuration must be
-specified along with the new values for username and password. This
-should result in a 2xx response and the instance of netconf-connector
-called new-netconf-device will be reconfigured to use username bob and
-password passwd. New configuration can be verified by executing:
-
-GET
-http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/controller-config/yang-ext:mount/config:modules/module/odl-sal-netconf-connector-cfg:sal-netconf-connector/new-netconf-device
-
-With new configuration, the old connection will be closed and a new one
-established.
-
-Destroying Netconf-Connector While the Controller is Running
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-Using RESTCONF one can also destroy an instance of a module. In case of
-netconf-connector, the module will be destroyed, NETCONF connection
-dropped and all resources will be cleaned. To do this, simply issue a
-request to following URL:
-
-DELETE
-http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/controller-config/yang-ext:mount/config:modules/module/odl-sal-netconf-connector-cfg:sal-netconf-connector/new-netconf-device
-
-The last element of the URL is the name of the instance and its
-predecessor is the type of that module (In our case the type is
-**sal-netconf-connector** and name **new-netconf-device**). The type and
-name are actually the keys of the module list.
-
-Netconf-connector configuration with MD-SAL
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-It is also possible to configure new NETCONF connectors directly through
-MD-SAL with the usage of the network-topology model. You can configure
-new NETCONF connectors both through the NETCONF server for MD-SAL (port
-2830) or RESTCONF. This guide focuses on RESTCONF.
-
-.. tip::
-
-    To enable NETCONF connector configuration through MD-SAL install
-    either the ``odl-netconf-topology`` or
-    ``odl-netconf-clustered-topology`` feature. We will explain the
-    difference between these features later.
+     topology-netconf value of topology list.
 
 Preconditions
 ^^^^^^^^^^^^^
@@ -370,27 +100,7 @@ Preconditions
 2. In Karaf, you must have the ``odl-netconf-topology`` or
    ``odl-netconf-clustered-topology`` feature installed.
 
-3. Feature ``odl-restconf`` must be installed
-
-4. Wait until log displays following entry:
-
-   ::
-
-       Successfully pushed configuration snapshot 02-netconf-topology.xml(odl-netconf-topology,odl-netconf-topology)
-
-   or until
-
-   ::
-
-       GET http://localhost:8181/restconf/operational/network-topology:network-topology/topology/topology-netconf/
-
-   returns a non-empty response, for example:
-
-   ::
-
-       <topology xmlns="urn:TBD:params:xml:ns:yang:network-topology">
-         <topology-id>topology-netconf</topology-id>
-       </topology>
+3. Feature ``odl-restconf-nb`` must be installed
 
 Spawning new NETCONF connectors
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -401,8 +111,6 @@ to RESTCONF:
 .. list-table::
    :widths: 1 5
 
-   * - bierman02
-     - http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/new-netconf-device
    * - rfc8040
      - http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=new-netconf-device
 
@@ -412,37 +120,68 @@ without specifying the node in the URL:
 .. list-table::
    :widths: 1 5
 
-   * - bierman02
-     - http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf
    * - rfc8040
      - http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf
 
-Headers:
+Payload:
 
--  Accept: application/xml
+.. tabs::
 
--  Content-Type: application/xml
+   .. tab:: XML
 
-Payload:
+      **Content-type:** ``application/xml``
 
-::
+      **Accept:** ``application/xml``
 
-    <node xmlns="urn:TBD:params:xml:ns:yang:network-topology">
-      <node-id>new-netconf-device</node-id>
-      <host xmlns="urn:opendaylight:netconf-node-topology">127.0.0.1</host>
-      <port xmlns="urn:opendaylight:netconf-node-topology">17830</port>
-      <username xmlns="urn:opendaylight:netconf-node-topology">admin</username>
-      <password xmlns="urn:opendaylight:netconf-node-topology">admin</password>
-      <tcp-only xmlns="urn:opendaylight:netconf-node-topology">false</tcp-only>
-      <!-- non-mandatory fields with default values, you can safely remove these if you do not wish to override any of these values-->
-      <reconnect-on-changed-schema xmlns="urn:opendaylight:netconf-node-topology">false</reconnect-on-changed-schema>
-      <connection-timeout-millis xmlns="urn:opendaylight:netconf-node-topology">20000</connection-timeout-millis>
-      <max-connection-attempts xmlns="urn:opendaylight:netconf-node-topology">0</max-connection-attempts>
-      <between-attempts-timeout-millis xmlns="urn:opendaylight:netconf-node-topology">2000</between-attempts-timeout-millis>
-      <sleep-factor xmlns="urn:opendaylight:netconf-node-topology">1.5</sleep-factor>
-      <!-- keepalive-delay set to 0 turns off keepalives-->
-      <keepalive-delay xmlns="urn:opendaylight:netconf-node-topology">120</keepalive-delay>
-    </node>
+      **Authentication:** ``admin:admin``
+
+      .. code-block:: xml
+
+         <node xmlns="urn:TBD:params:xml:ns:yang:network-topology">
+           <node-id>new-netconf-device</node-id>
+           <host xmlns="urn:opendaylight:netconf-node-topology">127.0.0.1</host>
+           <port xmlns="urn:opendaylight:netconf-node-topology">17830</port>
+           <username xmlns="urn:opendaylight:netconf-node-topology">admin</username>
+           <password xmlns="urn:opendaylight:netconf-node-topology">admin</password>
+           <tcp-only xmlns="urn:opendaylight:netconf-node-topology">false</tcp-only>
+           <!-- non-mandatory fields with default values, you can safely remove these if you do not wish to override any of these values-->
+           <reconnect-on-changed-schema xmlns="urn:opendaylight:netconf-node-topology">false</reconnect-on-changed-schema>
+           <connection-timeout-millis xmlns="urn:opendaylight:netconf-node-topology">20000</connection-timeout-millis>
+           <max-connection-attempts xmlns="urn:opendaylight:netconf-node-topology">0</max-connection-attempts>
+           <between-attempts-timeout-millis xmlns="urn:opendaylight:netconf-node-topology">2000</between-attempts-timeout-millis>
+           <sleep-factor xmlns="urn:opendaylight:netconf-node-topology">1.5</sleep-factor>
+           <!-- keepalive-delay set to 0 turns off keepalives-->
+           <keepalive-delay xmlns="urn:opendaylight:netconf-node-topology">120</keepalive-delay>
+         </node>
+
+   .. tab:: JSON
+
+      **Content-type:** ``application/json``
+
+      **Accept:** ``application/json``
+
+      **Authentication:** ``admin:admin``
+
+      .. code-block:: json
+
+         {
+             "node": [
+                 {
+                     "node-id": "new-netconf-device",
+                     "netconf-node-topology:port": 17830,
+                     "netconf-node-topology:reconnect-on-changed-schema": false,
+                     "netconf-node-topology:connection-timeout-millis": 20000,
+                     "netconf-node-topology:tcp-only": false,
+                     "netconf-node-topology:max-connection-attempts": 0,
+                     "netconf-node-topology:username": "admin",
+                     "netconf-node-topology:password": "admin",
+                     "netconf-node-topology:sleep-factor": 1.5,
+                     "netconf-node-topology:host": "127.0.0.1",
+                     "netconf-node-topology:between-attempts-timeout-millis": 2000,
+                     "netconf-node-topology:keepalive-delay": 120
+                 }
+             ]
+         }
 
 Note that the device name in <node-id> element must match the last
 element of the restconf URL.
@@ -464,9 +203,9 @@ be:
 
 Headers:
 
--  Accept: application/yang.patch-status+json
+-  Accept: application/yang-data+json
 
--  Content-Type: application/yang.patch+json
+-  Content-Type: application/yang-patch+json
 
 Example JSON payload to modify the password entry:
 
@@ -493,7 +232,6 @@ Example JSON payload to modify the password entry:
       }
     }
 
-
 Deleting an existing connector
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -504,8 +242,6 @@ device:
 .. list-table::
    :widths: 1 5
 
-   * - bierman02
-     - http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/new-netconf-device
    * - rfc8040
      - http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=new-netconf-device
 
@@ -513,6 +249,124 @@ device:
 
     No body is needed to delete the node/device
 
+Connecting to a device not supporting NETCONF monitoring
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The netconf-connector in OpenDaylight relies on ietf-netconf-monitoring
+support when connecting to remote NETCONF device. The
+ietf-netconf-monitoring support allows netconf-connector to list and
+download all YANG schemas that are used by the device. NETCONF connector
+can only communicate with a device if it knows the set of used schemas
+(or at least a subset). However, some devices use YANG models internally
+but do not support NETCONF monitoring. Netconf-connector can also
+communicate with these devices, but you have to side load the necessary
+yang models into OpenDaylight’s YANG model cache for netconf-connector.
+In general there are 2 situations you might encounter:
+
+**1. NETCONF device does not support ietf-netconf-monitoring but it does
+list all its YANG models as capabilities in HELLO message**
+
+This could be a device that internally uses only ietf-inet-types YANG
+model with revision 2010-09-24. In the HELLO message that is sent from
+this device there is this capability reported:
+
+::
+
+    urn:ietf:params:xml:ns:yang:ietf-inet-types?module=ietf-inet-types&revision=2010-09-24
+
+**For such devices you only need to put the schema into folder
+cache/schema inside your Karaf distribution.**
+
+.. important::
+
+    The file with YANG schema for ietf-inet-types has to be called
+    ietf-inet-types@2010-09-24.yang. It is the required naming format of
+    the cache.
+
+**2. NETCONF device does not support ietf-netconf-monitoring and it does
+NOT list its YANG models as capabilities in HELLO message**
+
+Compared to device that lists its YANG models in HELLO message, in this
+case there would be no capability with ietf-inet-types in the HELLO
+message. This type of device basically provides no information about the
+YANG schemas it uses so its up to the user of OpenDaylight to properly
+configure netconf-connector for this device.
+
+Netconf-connector has an optional configuration attribute called
+yang-module-capabilities and this attribute can contain a list of "YANG
+module based" capabilities. So by setting this configuration attribute,
+it is possible to override the "yang-module-based" capabilities reported
+in HELLO message of the device. To do this, we need to modify the
+configuration of netconf-connector like in the example below:
+
+.. tabs::
+
+   .. tab:: XML
+
+      **Content-type:** ``application/xml``
+
+      **Accept:** ``application/xml``
+
+      **Authentication:** ``admin:admin``
+
+      .. code-block:: xml
+
+         <node xmlns="urn:TBD:params:xml:ns:yang:network-topology">
+           <node-id>r5</node-id>
+           <host xmlns="urn:opendaylight:netconf-node-topology">127.0.0.1</host>
+           <port xmlns="urn:opendaylight:netconf-node-topology">8305</port>
+           <username xmlns="urn:opendaylight:netconf-node-topology">root</username>
+           <password xmlns="urn:opendaylight:netconf-node-topology">root</password>
+           <tcp-only xmlns="urn:opendaylight:netconf-node-topology">false</tcp-only>
+           <keepalive-delay xmlns="urn:opendaylight:netconf-node-topology">30</keepalive-delay>
+           <yang-module-capabilities xmlns="urn:opendaylight:netconf-node-topology">
+             <override>true</override>
+             <capability xmlns="urn:opendaylight:netconf-node-topology">
+               urn:ietf:params:xml:ns:yang:ietf-inet-types?module=ietf-inet-types&amp;revision=2013-07-15
+             </capability>
+           </yang-module-capabilities>
+         </node>
+
+   .. tab:: JSON
+
+      **Content-type:** ``application/json``
+
+      **Accept:** ``application/json``
+
+      **Authentication:** ``admin:admin``
+
+      .. code-block:: json
+
+         {
+             "node": [
+                 {
+                     "node-id": "device",
+                     "netconf-node-topology:host": "127.0.0.1",
+                     "netconf-node-topology:password": "root",
+                     "netconf-node-topology:username": "root",
+                     "netconf-node-topology:yang-module-capabilities": {
+                         "override": true,
+                         "capability": [
+                             "urn:ietf:params:xml:ns:yang:ietf-inet-types?module=ietf-inet-types&revision=2013-07-15"
+                         ]
+                     },
+                     "netconf-node-topology:port": 8305,
+                     "netconf-node-topology:tcp-only": false,
+                     "netconf-node-topology:keepalive-delay": 30
+                 }
+             ]
+         }
+
+**Remember to also put the YANG schemas into the cache folder.**
+
+.. note::
+
+    For putting multiple capabilities, you just need to replicate the
+    capability element inside yang-module-capability element.
+    Capability element is modeled as a leaf-list. With this
+    configuration, we would make the remote device report usage of
+    ietf-inet-types in the eyes of netconf-connector.
+
 Connecting to a device supporting only NETCONF 1.0
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -571,7 +425,7 @@ developers can be found in the developers guide or in the official
 tutorial application **ncmount** that can be found in the coretutorials
 project:
 
--  https://github.com/opendaylight/coretutorials/tree/stable/beryllum/ncmount
+-  https://github.com/opendaylight/coretutorials/tree/master/ncmount
 
 Reading data from the device
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -579,10 +433,10 @@ Reading data from the device
 Just invoke (no body needed):
 
 GET
-http://localhost:8080/restconf/operational/network-topology:network-topology/topology/topology-netconf/node/new-netconf-device/yang-ext:mount/
+http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=new-netconf-device/yang-ext:mount?content=nonconfig
 
 This will return the entire content of operation datastore from the
-device. To view just the configuration datastore, change **operational**
+device. To view just the configuration datastore, change **nonconfig**
 in this URL to **config**.
 
 Writing configuration data to the device
@@ -596,7 +450,7 @@ In fact this request comes from the tutorial dedicated to the
 **ncmount** tutorial app.
 
 POST
-http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/new-netconf-device/yang-ext:mount/Cisco-IOS-XR-ifmgr-cfg:interface-configurations
+http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=new-netconf-device/yang-ext:mount/Cisco-IOS-XR-ifmgr-cfg:interface-configurations
 
 ::
 
@@ -632,7 +486,7 @@ shows how to invoke the get-schema RPC (get-schema is quite common among
 netconf devices). Invoke:
 
 POST
-http://localhost:8181/restconf/operations/network-topology:network-topology/topology/topology-netconf/node/new-netconf-device/yang-ext:mount/ietf-netconf-monitoring:get-schema
+http://localhost:8181/rests/operations/network-topology:network-topology/topology=topology-netconf/node=new-netconf-device/yang-ext:mount/ietf-netconf-monitoring:get-schema
 
 ::
 
@@ -656,7 +510,7 @@ Netopeer installation
 
 A `Docker <https://www.docker.com/>`__ container with netopeer will be
 used in this guide. To install Docker and start the `netopeer
-image <https://index.docker.io/u/dockeruser/netopeer/>`__ perform
+image <https://hub.docker.com/r/sysrepo/sysrepo-netopeer2>`__ perform
 following steps:
 
 1. Install docker http://docs.docker.com/linux/step_one/
@@ -665,14 +519,14 @@ following steps:
 
    ::
 
-       docker run --rm -t -p 1831:830 dockeruser/netopeer
+       docker run -it --name sysrepo -p 830:830 --rm sysrepo/sysrepo-netopeer2:latest
 
 3. Verify netopeer is running by invoking (netopeer should send its
    HELLO message right away:
 
    ::
 
-       ssh root@localhost -p 1831 -s netconf
+       ssh root@localhost -p 830 -s netconf
        (password root)
 
 Mounting netopeer NETCONF server
@@ -700,7 +554,7 @@ After netopeer is mounted successfully, its configuration can be read
 using RESTCONF by invoking:
 
 GET
-http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/netopeer/yang-ext:mount/
+http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=netopeer/yang-ext:mount?content:config
 
 Northbound (NETCONF servers)
 ----------------------------
@@ -774,7 +628,7 @@ In terms of RFCs, these are supported:
 
 -  `RFC-6022 <https://tools.ietf.org/html/rfc6022>`__
 
--  `draft-ietf-netconf-yang-library-06 <https://tools.ietf.org/html/draft-ietf-netconf-yang-library-06>`__
+-  `RFC-7895 <https://tools.ietf.org/html/rfc7895>`__
 
 Notifications over NETCONF are not supported in the Boron release.
 
@@ -822,7 +676,7 @@ Now the MD-SAL’s datastore can be read over RESTCONF via NETCONF by
 invoking:
 
 GET
-http://localhost:8181/restconf/operational/network-topology:network-topology/topology/topology-netconf/node/controller-mdsal/yang-ext:mount
+http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=controller-mdsal/yang-ext:mount?content:nonconfig
 
 .. note::
 
@@ -860,12 +714,12 @@ YANGLIB configuration through RESTCONF
 You have to specify what local YANG modules directory you want to provide.
 Then you have to specify address and port whre you want to provide YANG
 sources. For example, we want to serve yang sources from folder /sources
-on localhost:5000 adress. The configuration for this scenario will be
+on localhost:8181 adress. The configuration for this scenario will be
 as follows:
 
 ::
 
-    PUT  http://localhost:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/node/controller-config/yang-ext:mount/config:modules/module/yanglib:yanglib/example
+    PUT  http://localhost:8181/rests/data/yanglib:yanglib-config
 
 Headers:
 
@@ -877,17 +731,11 @@ Payload:
 
 ::
 
-   <module xmlns="urn:opendaylight:params:xml:ns:yang:controller:config">
-     <name>example</name>
-     <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:yanglib:impl">prefix:yanglib</type>
-     <broker xmlns="urn:opendaylight:params:xml:ns:yang:controller:yanglib:impl">
-       <type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:binding">prefix:binding-broker-osgi-registry</type>
-       <name>binding-osgi-broker</name>
-     </broker>
-     <cache-folder xmlns="urn:opendaylight:params:xml:ns:yang:controller:yanglib:impl">/sources</cache-folder>
-     <binding-addr xmlns="urn:opendaylight:params:xml:ns:yang:controller:yanglib:impl">localhost</binding-addr>
-     <binding-port xmlns="urn:opendaylight:params:xml:ns:yang:controller:yanglib:impl">5000</binding-port>
-   </module>
+    <yanglib-config xmlns="urn:opendaylight:params:xml:ns:yang:controller:yanglib:impl">
+        <cache-folder>cache/newSchema</cache-folder>
+        <binding-addr>localhost</binding-addr>
+        <binding-port>8181</binding-port>
+    </yanglib-config>
 
 This should result in a 2xx response and new YANGLIB instance should be
 created. This YANGLIB takes all YANG sources from /sources folder and
@@ -895,7 +743,7 @@ for each generates URL in form:
 
 ::
 
-    http://localhost:5000/schemas/{modelName}/{revision}
+    http://localhost:8181/yanglib/schemas/{modelName}/{revision}
 
 On this URL will be hosted YANG source for particular module.
 
@@ -916,7 +764,7 @@ XML
 ::
 
     <yang-library xmlns="urn:opendaylight:netconf-node-topology">
-      <yang-library-url xmlns="urn:opendaylight:netconf-node-topology">http://localhost:8181/restconf/operational/ietf-yang-library:modules-state</yang-library-url>
+      <yang-library-url xmlns="urn:opendaylight:netconf-node-topology">http://localhost:8181/rests/data/ietf-yang-library:modules-state</yang-library-url>
       <username xmlns="urn:opendaylight:netconf-node-topology">admin</username>
       <password xmlns="urn:opendaylight:netconf-node-topology">admin</password>
     </yang-library>
@@ -927,12 +775,6 @@ particular mount point.
 NETCONF Call Home
 -----------------
 
-.. important::
-
-    The call home feature is experimental and will change in a future
-    release. In particular, the Yang models will change to those specified
-    in the `RFC 8071 <https://tools.ietf.org/html/rfc8071>`__
-
 Call Home Installation
 ~~~~~~~~~~~~~~~~~~~~~~
 
@@ -947,8 +789,10 @@ configuring Call Home & testing its functionality.
 
 .. note::
 
-    In order to test Call Home functionality we recommend Netopeer.
-    See `Netopeer Call Home <https://github.com/CESNET/netopeer/wiki/CallHome>`__ to learn how to enable call-home on Netopeer.
+    In order to test Call Home functionality we recommend Netopeer or
+    Netopeer2. See `Netopeer Call Home <https://github.com/CESNET/netopeer/wiki/CallHome>`__
+    or `Netopeer2 <https://github.com/CESNET/netopeer2>`__ to learn how to
+    enable call-home on Netopeer.
 
 Northbound Call-Home API
 ~~~~~~~~~~~~~~~~~~~~~~~~
@@ -959,12 +803,16 @@ following describes this configuration.
 Global Configuration
 ^^^^^^^^^^^^^^^^^^^^
 
+.. important::
+  The global configuration is not a part of the `RFC 8071
+  <https://tools.ietf.org/html/rfc8071>`__ and, therefore, subject to change.
+
 Configuring global credentials
 ''''''''''''''''''''''''''''''
 
-ODL Call-Home server allows user to configure global credentials, which
-will be used for devices which does not have device-specific credentials
-configured.
+ODL Call-Home server allows user to configure global credentials, which will be
+used for connected over SSH transport protocol devices which does not have
+device-specific credentials configured.
 
 This is done by creating
 ``/odl-netconf-callhome-server:netconf-callhome-server/global/credentials``
@@ -972,10 +820,10 @@ with username and passwords specified.
 
 *Configuring global username & passwords to try*
 
-.. code-block:: none
+.. code-block::
 
-    PUT
-    /restconf/config/odl-netconf-callhome-server:netconf-callhome-server/global/credentials HTTP/1.1
+    PUT HTTP/1.1
+    /rests/data/odl-netconf-callhome-server:netconf-callhome-server/global/credentials
     Content-Type: application/json
     Accept: application/json
 
@@ -1009,44 +857,113 @@ This is a debug feature and should not be used in production. Besides being an o
 security issue, this also causes the Call-Home Server to drastically increase its output
 to the log.
 
-.. code-block:: none
+.. code-block::
 
-    POST
-    /restconf/config/odl-netconf-callhome-server:netconf-callhome-server/global HTTP/1.1
+    PUT HTTP/1.1
+    /rests/data/odl-netconf-callhome-server:netconf-callhome-server/global/accept-all-ssh-keys
     Content-Type: application/json
     Accept: application/json
 
 .. code-block:: json
 
     {
-      "global": {
         "accept-all-ssh-keys": "true"
-      }
     }
 
 Device-Specific Configuration
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-Allowing Device & Configuring Name
-''''''''''''''''''''''''''''''''''
+Netconf Call Home server supports both of the secure transports used
+by the Network Configuration Protocol (NETCONF) - Secure Shell (SSH),
+and Transport Layer Security (TLS).
+
+Configure device to connect over SSH protocol
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Netconf Call Home Server uses device provided SSH server key (host key)
 to identify device. The pairing of name and server key is configured in
 ``/odl-netconf-callhome-server:netconf-callhome-server/allowed-devices``.
-This list is colloquially called a whitelist.
+This list is colloquially called a allowlist.
 
-If the Call-Home Server finds the SSH host key in the whitelist, it continues
+If the Call-Home Server finds the SSH host key in the allowlist, it continues
 to negotiate a NETCONF connection over an SSH session. If the SSH host key is
 not found, the connection between the Call Home server and the device is dropped
 immediately. In either case, the device that connects to the Call home server
 leaves a record of its presence in the operational store.
 
+Configuring Device with Device-specific Credentials
+'''''''''''''''''''''''''''''''''''''''''''''''''''
+
+Adding specific device to the allowed list is done by creating
+``/odl-netconf-callhome-server:netconf-callhome-server/allowed-devices/device={device}``
+with device-id and connection parameters inside the ssh-client-params container.
+
+*Configuring Device with Credentials*
+
+.. code-block::
+
+    PUT HTTP/1.1
+    /rests/data/odl-netconf-callhome-server:netconf-callhome-server/allowed-devices/device=example
+    Content-Type: application/json
+    Accept: application/json
+
+.. code-block:: json
+
+    {
+      "device": {
+        "unique-id": "example",
+        "ssh-client-params": {
+          "credentials": {
+            "username": "example",
+            "passwords": [ "password" ]
+          },
+          "host-key": "AAAAB3NzaC1yc2EAAAADAQABAAABAQDHoH1jMjltOJnCt999uaSfc48ySutaD3ISJ9fSECe1Spdq9o9mxj0kBTTTq+2V8hPspuW75DNgN+V/rgJeoUewWwCAasRx9X4eTcRrJrwOQKzb5Fk+UKgQmenZ5uhLAefi2qXX/agFCtZi99vw+jHXZStfHm9TZCAf2zi+HIBzoVksSNJD0VvPo66EAvLn5qKWQD4AdpQQbKqXRf5/W8diPySbYdvOP2/7HFhDukW8yV/7ZtcywFUIu3gdXsrzwMnTqnATSLPPuckoi0V2jd8dQvEcu1DY+rRqmqu0tEkFBurlRZDf1yhNzq5xWY3OXcjgDGN+RxwuWQK3cRimcosH"
+        }
+      }
+    }
+
+Configuring Device with Global Credentials
+'''''''''''''''''''''''''''''''''''''''''''''''''''
+
+It is possible to omit ``username`` and ``password`` for ssh-client-params,
+in such case values from global credentials will be used.
+
 *Example of configuring device*
 
-.. code-block:: none
+.. code-block::
 
-    PUT
-    /restconf/config/odl-netconf-callhome-server:netconf-callhome-server/allowed-devices/device/example HTTP/1.1
+    PUT HTTP/1.1
+    /rests/data/odl-netconf-callhome-server:netconf-callhome-server/allowed-devices/device=example
+    Content-Type: application/json
+    Accept: application/json
+
+.. code-block:: json
+
+    {
+      "device": {
+        "unique-id": "example",
+        "ssh-client-params": {
+          "host-key": "AAAAB3NzaC1yc2EAAAADAQABAAABAQDHoH1jMjltOJnCt999uaSfc48ySutaD3ISJ9fSECe1Spdq9o9mxj0kBTTTq+2V8hPspuW75DNgN+V/rgJeoUewWwCAasRx9X4eTcRrJrwOQKzb5Fk+UKgQmenZ5uhLAefi2qXX/agFCtZi99vw+jHXZStfHm9TZCAf2zi+HIBzoVksSNJD0VvPo66EAvLn5qKWQD4AdpQQbKqXRf5/W8diPySbYdvOP2/7HFhDukW8yV/7ZtcywFUIu3gdXsrzwMnTqnATSLPPuckoi0V2jd8dQvEcu1DY+rRqmqu0tEkFBurlRZDf1yhNzq5xWY3OXcjgDGN+RxwuWQK3cRimcosH"
+        }
+      }
+    }
+
+Deprecated configuration models for devices accessed with SSH protocol
+''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+
+With `RFC 8071 <https://tools.ietf.org/html/rfc8071>`__ alignment and adding
+support for TLS transport following configuration models has been marked
+deprecated.
+
+Configuring Device with Global Credentials
+'''''''''''''''''''''''''''''''''''''''''''''''''''
+
+*Example of configuring device*
+
+.. code-block::
+
+    PUT HTTP/1.1
+    /rests/data/odl-netconf-callhome-server:netconf-callhome-server/allowed-devices/device=example
     Content-Type: application/json
     Accept: application/json
 
@@ -1068,10 +985,10 @@ device-specific configuration. Format is same as in global credentials.
 
 *Configuring Device with Credentials*
 
-.. code-block:: none
+.. code-block::
 
-    PUT
-    /restconf/config/odl-netconf-callhome-server:netconf-callhome-server/allowed-devices/device/example HTTP/1.1
+    PUT HTTP/1.1
+    /rests/data/odl-netconf-callhome-server:netconf-callhome-server/allowed-devices/device=example
     Content-Type: application/json
     Accept: application/json
 
@@ -1088,6 +1005,117 @@ device-specific configuration. Format is same as in global credentials.
       }
     }
 
+Configure device to connect over TLS protocol
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Netconf Call Home Server allows devices to use TLS transport protocol to
+establish a connection towards the NETCONF device. This communication
+requires proper setup to make two-way TLS authentication possible for client
+and server.
+
+The initial step is to configure certificates and keys for two-way TLS by
+storing them within the netconf-keystore.
+
+*Adding a client private key credential to the netconf-keystore*
+
+.. code-block::
+
+    POST HTTP/1.1
+    /rests/operations/netconf-keystore:add-keystore-entry
+    Content-Type: application/json
+    Accept: application/json
+
+.. code-block:: json
+
+  {
+    "input": {
+      "key-credential": [
+        {
+          "key-id": "example-client-key-id",
+          "private-key": "base64encoded-private-key",
+          "passphrase": "passphrase"
+        }
+      ]
+    }
+  }
+
+*Associate a private key with a client and CA certificates chain*
+
+.. code-block::
+
+    POST HTTP/1.1
+    /rests/operations/netconf-keystore:add-private-key
+    Content-Type: application/json
+    Accept: application/json
+
+.. code-block:: json
+
+  {
+    "input": {
+      "private-key": [
+        {
+          "name": "example-client-key-id",
+          "data": "key-data",
+          "certificate-chain": [
+            "certificate-data"
+          ]
+        }
+      ]
+    }
+  }
+
+*Add a list of trusted CA and server certificates*
+
+.. code-block::
+
+    POST HTTP/1.1
+    /rests/operations/netconf-keystore:add-trusted-certificate
+    Content-Type: application/json
+    Accept: application/json
+
+.. code-block:: json
+
+  {
+    "input": {
+      "trusted-certificate": [
+        {
+          "name": "example-ca-certificate",
+          "certificate": "ca-certificate-data"
+        },
+        {
+          "name": "example-server-certificate",
+          "certificate": "server-certificate-data"
+        }
+      ]
+    }
+  }
+
+In a second step, it is required to create an allowed device associated with
+a server certificate and client key. The server certificate will be used to
+identify and pin the NETCONF device during SSL handshake and should be unique
+among the allowed devices.
+
+*Add device configuration for TLS protocol to allowed devices list*
+
+.. code-block::
+
+    PUT HTTP/1.1
+    /rests/data/odl-netconf-callhome-server:netconf-callhome-server/allowed-devices/device=example-device
+    Content-Type: application/json
+    Accept: application/json
+
+.. code-block:: json
+
+  {
+    "device": {
+      "unique-id": "example-device",
+      "tls-client-params": {
+        "key-id": "example-client-key-id",
+        "certificate-id": "example-server-certificate"
+      }
+    }
+  }
+
 Operational Status
 ^^^^^^^^^^^^^^^^^^
 
@@ -1116,7 +1144,7 @@ available for network management.
 Rogue Devices
 '''''''''''''
 
-Devices which are not on the whitelist might try to connect to the Call-Home Server. In
+Devices which are not on the allowlist might try to connect to the Call-Home Server. In
 these cases, the server will keep a record by instantiating an operational device. There
 will be no corresponding config device for these rogues. They can be identified readily
 because their device id, rather than being user-supplied, will be of the form
@@ -1129,9 +1157,452 @@ Southbound Call-Home API
 
 The Call-Home Server listens for incoming TCP connections and assumes that the other side of
 the connection is a device calling home via a NETCONF connection with SSH for
-management. The server uses port 6666 by default and this can be configured via a
+management. The server uses port 4334 by default and this can be configured via a
 blueprint configuration file.
 
 The device **must** initiate the connection and the server will not try to re-establish the
 connection in case of a drop. By requirement, the server cannot assume it has connectivity
 to the device due to NAT or firewalls among others.
+
+Reading data with selected fields
+---------------------------------
+
+Overview
+~~~~~~~~
+
+If user would like to read only selected fields from NETCONF device, it is possible to use
+fields query parameter that is described by RFC-8040. RESTCONF parses content of query
+parameter into format that is accepted by NETCONF subtree filtering - filtering of data is done
+on NETCONF server, not on NETCONF client side. This approach optimizes network traffic load,
+because data in which user doesn't have interest, is not transferred over network.
+
+Next advantages:
+
+* using single RESTCONF request and single NETCONF RPC for reading multiple subtrees
+* possibility to read only selected fields under list node across multiple hierarchies
+  (it cannot be done without proper selection API)
+
+.. note::
+
+  More information about fields query parameter: `RFC 8071 <https://tools.ietf.org/html/rfc8040#section-4.8.3>`__
+
+Preparation of data
+~~~~~~~~~~~~~~~~~~~
+
+For demonstration, we will define next YANG model:
+
+::
+
+    module test-module {
+        yang-version 1.1;
+        namespace "urn:opendaylight:test-module";
+        prefix "tm";
+        revision "2023-02-16";
+
+        container root {
+            container simple-root {
+                leaf leaf-a {
+                    type string;
+                }
+                leaf leaf-b {
+                    type string;
+                }
+                leaf-list ll {
+                    type string;
+                }
+                container nested {
+                    leaf sample-x {
+                        type boolean;
+                    }
+                    leaf sample-y {
+                        type boolean;
+                    }
+                }
+            }
+
+            container list-root {
+                leaf branch-ab {
+                    type int32;
+                }
+                list top-list {
+                    key "key-1 key-2";
+                    ordered-by user;
+                    leaf key-1 {
+                        type string;
+                    }
+                    leaf key-2 {
+                        type string;
+                    }
+                    container next-data {
+                        leaf switch-1 {
+                            type empty;
+                        }
+                        leaf switch-2 {
+                            type empty;
+                        }
+                    }
+                    list nested-list {
+                        key "identifier";
+                        leaf identifier {
+                            type string;
+                        }
+                        leaf foo {
+                            type int32;
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+Follow the :doc:`testtool` instructions to save this schema and run it with testtool.
+
+Mounting NETCONF device that runs on NETCONF testtool:
+
+.. code-block:: bash
+
+  curl --location --request PUT 'http://127.0.0.1:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=testtool' \
+  --header 'Authorization: Basic YWRtaW46YWRtaW4=' \
+  --header 'Content-Type: application/json' \
+  --data-raw '{
+      "node": [
+          {
+              "node-id": "testtool",
+              "netconf-node-topology:host": "127.0.0.1",
+              "netconf-node-topology:port": 17830,
+              "netconf-node-topology:keepalive-delay": 100,
+              "netconf-node-topology:tcp-only": false,
+              "netconf-node-topology:username": "admin",
+              "netconf-node-topology:password": "admin"
+          }
+      ]
+  }'
+
+Setting initial configuration on NETCONF device:
+
+.. code-block:: bash
+
+  curl --location --request PUT 'http://127.0.0.1:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=testtool/yang-ext:mount/test-module:root' \
+  --header 'Authorization: Basic YWRtaW46YWRtaW4=' \
+  --header 'Content-Type: application/json' \
+  --data-raw '{
+      "root": {
+          "simple-root": {
+              "leaf-a": "asddhg",
+              "leaf-b": "ffffff",
+              "ll": [
+                  "str1",
+                  "str2",
+                  "str3"
+              ],
+              "nested": {
+                  "sample-x": true,
+                  "sample-y": false
+              }
+          },
+          "list-root": {
+              "branch-ab": 5,
+              "top-list": [
+                  {
+                      "key-1": "ka",
+                      "key-2": "kb",
+                      "next-data": {
+                          "switch-1": [
+                              null
+                          ],
+                          "switch-2": [
+                              null
+                          ]
+                      },
+                      "nested-list": [
+                          {
+                              "identifier": "f1",
+                              "foo": 1
+                          },
+                          {
+                              "identifier": "f2",
+                              "foo": 10
+                          },
+                          {
+                              "identifier": "f3",
+                              "foo": 20
+                          }
+                      ]
+                  },
+                  {
+                      "key-1": "kb",
+                      "key-2": "ka",
+                      "next-data": {
+                          "switch-1": [
+                              null
+                          ]
+                      },
+                      "nested-list": [
+                          {
+                              "identifier": "e1",
+                              "foo": 1
+                          },
+                          {
+                              "identifier": "e2",
+                              "foo": 2
+                          },
+                          {
+                              "identifier": "e3",
+                              "foo": 3
+                          }
+                      ]
+                  },
+                  {
+                      "key-1": "kc",
+                      "key-2": "ke",
+                      "next-data": {
+                          "switch-2": [
+                              null
+                          ]
+                      },
+                      "nested-list": [
+                          {
+                              "identifier": "q1",
+                              "foo": 13
+                          },
+                          {
+                              "identifier": "q2",
+                              "foo": 14
+                          },
+                          {
+                              "identifier": "q3",
+                              "foo": 15
+                          }
+                      ]
+                  }
+              ]
+          }
+      }
+  }'
+
+Examples
+--------
+
+1. Reading whole leaf-list 'll' and leaf 'nested/sample-x' under 'simple-root' container.
+
+RESTCONF request:
+
+.. code-block:: bash
+
+    curl --location --request GET 'http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=testtool/yang-ext:mount/test-module:root/simple-root?content=config&fields=ll;nested/sample-x' \
+    --header 'Authorization: Basic YWRtaW46YWRtaW4=' \
+    --header 'Cookie: JSESSIONID=node01h4w82eorc1k61866b71qjgj503.node0'
+
+Generated NETCONF RPC request:
+
+.. code-block:: xml
+
+    <rpc message-id="m-18" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
+        <get-config>
+            <source>
+                <running/>
+            </source>
+            <filter xmlns:ns0="urn:ietf:params:xml:ns:netconf:base:1.0" ns0:type="subtree">
+                <root xmlns="urn:ietf:params:xml:ns:yang:test-model">
+                    <simple-root>
+                        <ll/>
+                        <nested>
+                            <sample-x/>
+                        </nested>
+                    </simple-root>
+                </root>
+            </filter>
+        </get-config>
+    </rpc>
+
+.. note::
+
+    Using fields query parameter it is also possible to read whole leaf-list or list without
+    necessity to specify value / key predicate (without reading parent entity). Such scenario
+    is not permitted in RFC-8040 paths alone - fields query parameter can be used as
+    workaround for this case.
+
+RESTCONF response:
+
+.. code-block:: json
+
+    {
+        "test-module:simple-root": {
+            "ll": [
+                "str3",
+                "str1",
+                "str2"
+            ],
+            "nested": {
+                "sample-x": true
+            }
+        }
+    }
+
+2. Reading all identifiers of 'nested-list' under all elements of 'top-list'.
+
+RESTCONF request:
+
+.. code-block:: bash
+
+    curl --location --request GET 'http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=testtool/yang-ext:mount/test-module:root/list-root?content=config&fields=top-list(nested-list/identifier)' \
+    --header 'Authorization: Basic YWRtaW46YWRtaW4=' \
+    --header 'Cookie: JSESSIONID=node01h4w82eorc1k61866b71qjgj503.node0'
+
+Generated NETCONF RPC request:
+
+.. code-block:: xml
+
+    <rpc message-id="m-27" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
+        <get-config>
+            <source>
+                <running/>
+            </source>
+            <filter xmlns:ns0="urn:ietf:params:xml:ns:netconf:base:1.0" ns0:type="subtree">
+                <root xmlns="urn:ietf:params:xml:ns:yang:test-model">
+                    <list-root>
+                        <top-list>
+                            <nested-list>
+                                <identifier/>
+                            </nested-list>
+                            <key-1/>
+                            <key-2/>
+                        </top-list>
+                    </list-root>
+                </root>
+            </filter>
+        </get-config>
+    </rpc>
+
+.. note::
+
+    NETCONF client automatically fetches values of list keys since they are required for correct
+    deserialization of NETCONF response and at the end serialization of response to RESTCONF
+    response (JSON/XML).
+
+RESTCONF response:
+
+.. code-block:: json
+
+    {
+        "test-module:list-root": {
+            "top-list": [
+                {
+                    "key-1": "ka",
+                    "key-2": "kb",
+                    "nested-list": [
+                        {
+                            "identifier": "f3"
+                        },
+                        {
+                            "identifier": "f2"
+                        },
+                        {
+                            "identifier": "f1"
+                        }
+                    ]
+                },
+                {
+                    "key-1": "kb",
+                    "key-2": "ka",
+                    "nested-list": [
+                        {
+                            "identifier": "e3"
+                        },
+                        {
+                            "identifier": "e2"
+                        },
+                        {
+                            "identifier": "e1"
+                        }
+                    ]
+                },
+                {
+                    "key-1": "kc",
+                    "key-2": "ke",
+                    "nested-list": [
+                        {
+                            "identifier": "q3"
+                        },
+                        {
+                            "identifier": "q2"
+                        },
+                        {
+                            "identifier": "q1"
+                        }
+                    ]
+                }
+            ]
+        }
+    }
+
+3. Reading value of leaf 'branch-ab' and all values of leaves 'switch-1' that are placed
+   under 'top-list' list elements.
+
+RESTCONF request:
+
+.. code-block:: bash
+
+    curl --location --request GET 'http://localhost:8181/rests/data/network-topology:network-topology/topology=topology-netconf/node=testtool/yang-ext:mount/test-module:root/list-root?content=config&fields=branch-ab;top-list/next-data/switch-1' \
+    --header 'Authorization: Basic YWRtaW46YWRtaW4=' \
+    --header 'Cookie: JSESSIONID=node01jx6o5thwae9t1ft7c2zau5zbz4.node0'
+
+Generated NETCONF RPC request:
+
+.. code-block:: xml
+
+    <rpc message-id="m-42" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
+        <get-config>
+            <source>
+                <running/>
+            </source>
+            <filter xmlns:ns0="urn:ietf:params:xml:ns:netconf:base:1.0" ns0:type="subtree">
+                <root xmlns="urn:ietf:params:xml:ns:yang:test-model">
+                    <list-root>
+                        <branch-ab/>
+                        <top-list>
+                            <next-data>
+                                <switch-1/>
+                            </next-data>
+                            <key-1/>
+                            <key-2/>
+                        </top-list>
+                    </list-root>
+                </root>
+            </filter>
+        </get-config>
+    </rpc>
+
+RESTCONF response:
+
+.. code-block:: json
+
+    {
+        "test-module:list-root": {
+            "branch-ab": 5,
+            "top-list": [
+                {
+                    "key-1": "ka",
+                    "key-2": "kb",
+                    "next-data": {
+                        "switch-1": [
+                            null
+                        ]
+                    }
+                },
+                {
+                    "key-1": "kb",
+                    "key-2": "ka",
+                    "next-data": {
+                        "switch-1": [
+                            null
+                        ]
+                    }
+                },
+                {
+                    "key-1": "kc",
+                    "key-2": "ke"
+                }
+            ]
+        }
+    }