Update Ansible groups documentation

docs/network.rst

@@ -86,6 +86,9 @@ The main *Ansible groups* page lists all the groups with their variables and ass
 
 .. image:: _static/ansible/list_ansible_groups.png
 
+Static groups
+~~~~~~~~~~~~~
+
 New group can be added from the *Register Ansible group* page:
 
 .. image:: _static/ansible/register_ansible_group.png
@@ -99,3 +102,26 @@ Hosts can be associated to a group from the *Edit Ansible group* page or from th
 Variables should be entered in YAML format. `CodeMirror <http://codemirror.net>`_ is used to provide a text editor with syntax higlighting
 in the register/edit pages.
 Refer to Ansible documentation for more information about `YAML Syntax <https://docs.ansible.com/ansible/latest/reference_appendices/YAMLSyntax.html>`_.
+
+Dynamic groups
+~~~~~~~~~~~~~~
+
+By default, groups are *static*. It is possible to create dynamic groups based on the *Network scope*, *Network* or *device type*.
+When creating a dynamic group, the name of the group should match the name of the type you target.
+
+Let's take an example. To create a group based on the **ICSVMs** Vlan name, create a group named **icsvms** (a group name is always in lower-case)
+and choose the type **NETWORK**. Note that you can't select any hosts.
+
+.. image:: _static/ansible/create_ansible_network_group.png
+
+Click submit. You can see the list of hosts part of the ICSVMs network:
+
+.. image:: _static/ansible/view_ansible_network_group.png
+
+Groups of groups
+~~~~~~~~~~~~~~~~
+
+You can also create `groups of groups <https://docs.ansible.com/ansible/latest/user_guide/intro_inventory.html#groups-of-groups-and-group-variables>`_.
+To do so, just select the group names in the *Children* field when registering a new group:
+
+.. image:: _static/ansible/create_ansible_group_of_groups.png