Red Hat Ansible for Network Automation

Compose NOS-specific device configuration templates to provide parameterized configuration statements.

1. Create a vars/ directory if it does not already exist.

   [student@workstation proj]$ mkdir -p vars

2. Download the layer3-branch-corp-cloud.yml file into the vars/ directory. This file maps IPv4 and IPv6 protocol data to interfaces.

   [student@workstation proj]$ cd vars
   [student@workstation vars]$ wget \
   > http://materials.example.com/full/vars/layer3-branch-corp-cloud.yml
   [student@workstation vars]$ cd ..
   [student@workstation proj]$

3. Create a Jinja2 template file named j2/ios-if-shut-all.j2 that contains the following:

   {% for intf in interface_data[inventory_hostname] %}
   {% if not intf.name.startswith('Loopback') %}
   interface {{ intf.name }}
     shutdown
   {% endif %}
   {% endfor %}

4. Create a Jinja2 template file named j2/ios-if-noshut-all.j2 that contains the following:

   {% for intf in interface_data[inventory_hostname] %}
   {% if not intf.name.startswith('Loopback') %}
   interface {{ intf.name }}
     no shutdown
   {% endif %}
   {% endfor %}

Perform a play that bounces all interfaces on an IOS device.

1. Compose a playbook named ios-bounce-if-all.yml that uses the templates.

   [student@workstation proj]$ cat ios-bounce-if-all.yml
   ---
   - name: bounce all interfaces on ios devices
     hosts: ios
     vars:
       shut_template: j2/ios-if-shut-all.j2
       no_shut_template: j2/ios-if-noshut-all.j2
     vars_files:
       - vars/layer3-branch-corp-cloud.yml
   
     tasks:
   
     - name: shut/no shut on all ios interfaces
       ios_config:
         src: "{{ shut_template }}"
       when: ansible_network_os == 'ios'
   
     - name: pause before enabling interfaces
       pause:
         seconds: 1
       when: ansible_network_os == 'ios'
   
     - name: shut/no shut on all ios interfaces
       ios_config:
         src: "{{ no_shut_template }}"
       when: ansible_network_os == 'ios'

2. Check the playbook syntax and then perform the play.

   [student@workstation proj]$ ansible-playbook --syntax-check ios-bounce-if-all.yml
   
   Playbook: ios-bounce-if-all.yml
   [student@workstation proj]$ ansible-playbook ios-bounce-if-all.yml