Flat and VLAN Mixed Network

Above image shows a sample configuration of a flat and VLAN mixed 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 the flat_networks and network_vlan_ranges property lines read as follows:

  flat_networks = vsw2
  network_vlan_ranges = vsw3:1:4094
  

• In the neutron z/VM agent configure file (default file name is /etc/neutron/plugins/zvm/neutron_zvm_plugin.ini), the following options are needed:

  [AGENT]
  cloud_connector_url = http:// 10.0.0.3:8080/
  

After restarting the neutron server and neutron z/VM agent, follow these steps on the OpenStack controller to create the network and subnet for each of the physical networks

• Create the flat network:

  openstack network create --shared --provider-network_type flat --provider-physical_network vsw2 singleflat2
  

• Create the appropriate subnet for the flat 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
  

• Create the vlan network. Enter the following command:

  openstack network create --shared --provider-network_type vlan --provider-physical_network vsw3 --provider-segment 521 vlannet
  

• Create the appropriate subnet for the vlan network:

  Openstack subnet create --allocation-pool start=2.2.3.5,end=2.2.3.254 --network vlannet --subnet-range 2.2.3.0/24 --gateway 2.2.3.1 vlannet-sub