How to do it...

1. Create a new playbook called pb_junos_ping.yml with the following task, to ping all core loopbacks within our sample network:

---
- name: "Validate Core Reachability"
  hosts: junos
  tasks:
    - name: "Ping Across All Loopback Interfaces"
      junos_ping:
        dest: "{{ item.value.split('/')[0] }}"
        interface: lo0.0
        size: 512
      with_dict: "{{lo_ip}}"
      vars:
        Ansible_connection: network_cli
      register: ping_rst
      ignore_errors: yes

2. Update the pb_junos_ping.yml playbook with the following task to create a custom report to capture the ping results:

    - name: Create Ping Report
      blockinfile:
        block: |
          Node | Destination | Packet Loss | Delay |
          -----| ------------| ------------| ------|
          {% for node in play_hosts %}
          {% for result in hostvars[node].ping_rst.results %}
          {% if result.rtt is defined %}
          {{ node }} | {{ result.item.value }} | {{ result.packet_loss }} | {{ result.rtt.avg }}
          {% else %}
          {{ node }} | {{ result.item.value }} | {{ result.packet_loss }} | 'N/A'
          {% endif %}
          {% endfor %}
          {% endfor %}
      path: ./ping_report.md
      create: yes
 run_once: yes