tested_inventory.yaml

---
all:
  vars:
    ansible_user: ec2-user
    # ansible_password: password
    # ansible_become_pass: password
    ansible_become: True
    ansible_become_method: enable
    ansible_network_cli_ssh_type: libssh
    ansible_ssh_private_key_file: "/home/student1/.ssh/aws-private.pem"
  children:
    arista:
      hosts:
        rtr2:
          ansible_host: 18.207.149.222
        rtr4:
          ansible_host: 52.90.149.125
      vars:
        ansible_network_os: arista.eos.eos
        ansible_connection: ansible.netcommon.network_cli
    cisco:
      hosts:
        rtr1:
          ansible_host: 172.16.255.19
      vars:
        ansible_network_os: cisco.ios.ios
        ansible_connection: ansible.netcommon.network_cli
    juniper:
      hosts:
        rtr3:
          ansible_host: 54.91.138.224
      vars:
        ansible_network_os: junipernetworks.junos.junos
        ansible_connection: ansible.netcommon.netconf
    routers:
      children:
        arista:
        cisco:
        juniper: