nexus1 ansible_host=172.16.1.131
nexus2 ansible_host=172.16.1.132
router1 ansible_host=172.16.1.133

[nxos]
nexus[1:2]

[ios]
router1

[lab:children]
nxos
ios

[all:vars]
ansible_user=admin
ansible_password=admin
ansible_connection=network_cli

[nxos:vars]
ansible_network_os=nxos

[ios:vars]
ansible_network_os=ios