Single Flat Network

The following scenarios show a single flat network, shows a flat network that uses public IP addresses, which can be reached from outside the network.

To use this scenario, the following configuration options are needed:

• In the neutron ML2 plugin configure file (default file name is /etc/neutron/plugins/ml2/ml2_conf.ini), make sure that mechanism_drivers is zvm and vsw2 is in the flat_networks option:

  [ml2]
  mechanism_drivers = zvm
  [ml2_type_flat]
  flat_networks = vsw2
  

• In the neutron z/VM agent configure file (default file name is /etc/neutron/plugins/zvm/neutron_zvm_plugin.ini), the option cloud_connector_url is the URL to be used to communicate with the z/VM cloud connector, and if the z/VM cloud connector set auth in wsgi section, a token file is required. Besides, if the vsw2 is not a predefined vswitch, make sure to define rdev_list with the OSA device number:

  [AGENT]
  cloud_connector_url = http:// 10.0.0.3:8080/
  zvm_cloud_connector_token_file = /etc/zvmsdk/token.dat
  
  [vsw2]
  # OSA2 uses RDEV A2
  rdev_list=a2
  

After restarting the neutron server and neutron z/VM agent, follow these steps on the OpenStack controller to create the network and subnet.

• Create the single flat network:

  openstack network create --shared --provider-network_type flat --provider-physical_network vsw2 singleflat
  

• Create the appropriate subnet for the network:

  Openstack subnet create --allocation-pool start=1.2.3.5,end=1.2.3.254 --network singleflat --subnet-range 1.2.3.0/24 --gateway 1.2.3.1 singleflat-sub