inventory.yml

---
all:
  vars:
    ansible_ssh_private_key_file: insecure_private_key
  children:
    juniper:
      vars:
        ansible_connection: netconf
        ansible_network_os: junos
      children:
        vMX:
        vQFX:
          hosts:
            sw1:
              ansible_host: 10.250.0.111
              ansible_user: vagrant
              version: 19.4R1.10
              model: VQFX-10000
    cisco:
      children:
        IOSXE:
        NXOS:
          hosts:
            n9kv1:
              ansible_host: 10.250.0.113
              ansible_user: vagrant
              ansible_password: vagrant
              version: 4.21.1.1F
              model: vEOS
    arista:
      children:
        vEOS:
          hosts:
            veos1:
              ansible_host: 10.250.0.112
              ansible_user: vagrant
              ansible_password: vagrant
              version: 4.21.1.1F
              model: vEOS
        cEOS:
...