[[email protected] ~]# . admin-openrc 
[[email protected] ~]# neutron net-create --shared --provider:physical_network provider \
>   --provider:network_type flat provider
Created a new network:
+---------------------------+--------------------------------------+
| Field                     | Value                                |
+---------------------------+--------------------------------------+
| admin_state_up            | True                                 |
| availability_zone_hints   |                                      |
| availability_zones        |                                      |
| created_at                | 2017-11-16T23:33:03                  |
| description               |                                      |
| id                        | 1e09654a-22c1-475b-ace6-d91b6852da3e |
| ipv4_address_scope        |                                      |
| ipv6_address_scope        |                                      |
| mtu                       | 1500                                 |
| name                      | provider                             |
| port_security_enabled     | True                                 |
| provider:network_type     | flat                                 |
| provider:physical_network | provider                             |
| provider:segmentation_id  |                                      |
| router:external           | False                                |
| shared                    | True                                 |
| status                    | ACTIVE                               |
| subnets                   |                                      |
| tags                      |                                      |
| tenant_id                 | af24a3c94886470183c864ef0f161b4c     |
| updated_at                | 2017-11-16T23:33:03                  |
+---------------------------+--------------------------------------+
 

[[email protected] ~]# neutron subnet-create --name provider \
>   --allocation-pool start=192.168.200.100,end=192.168.200.200 \
>   --dns-nameserver 114.114.114.114 --gateway 192.168.200.1 \
>   provider 192.168.200.0/24
Created a new subnet:
+-------------------+--------------------------------------------------------+
| Field             | Value                                                  |
+-------------------+--------------------------------------------------------+
| allocation_pools  | {"start": "192.168.200.100", "end": "192.168.200.200"} |
| cidr              | 192.168.200.0/24                                       |
| created_at        | 2017-11-16T23:49:23                                    |
| description       |                                                        |
| dns_nameservers   | 114.114.114.114                                        |
| enable_dhcp       | True                                                   |
| gateway_ip        | 192.168.200.1                                          |
| host_routes       |                                                        |
| id                | 42af45a3-eabf-4ac6-96f4-3755eca2c4ee                   |
| ip_version        | 4                                                      |
| ipv6_address_mode |                                                        |
| ipv6_ra_mode      |                                                        |
| name              | provider                                               |
| network_id        | 1e09654a-22c1-475b-ace6-d91b6852da3e                   |
| subnetpool_id     |                                                        |
| tenant_id         | af24a3c94886470183c864ef0f161b4c                       |
| updated_at        | 2017-11-16T23:49:23                                    |
+-------------------+--------------------------------------------------------+
 

私有網路

demo 或者其他非管理員使用者也可以建立這個網路，它只在 demo專案中提供對例項的訪問

. demo-openrc

[[email protected] ~]# neutron net-create selfservice
Created a new network:
+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| admin_state_up          | True                                 |
| availability_zone_hints |                                      |
| availability_zones      |                                      |
| created_at              | 2017-11-17T00:02:34                  |
| description             |                                      |
| id                      | 57961b46-8023-4e74-a16d-c806deebbfd6 |
| ipv4_address_scope      |                                      |
| ipv6_address_scope      |                                      |
| mtu                     | 1450                                 |
| name                    | selfservice                          |
| port_security_enabled   | True                                 |
| router:external         | False                                |
| shared                  | False                                |
| status                  | ACTIVE                               |
| subnets                 |                                      |
| tags                    |                                      |
| tenant_id               | 8cc1c04a21ae4165a1667e0bd5029831     |
| updated_at              | 2017-11-17T00:02:34                  |
+-------------------------+--------------------------------------+

報錯
[[email protected] ~]# neutron net-create selfservice
Unable to create the network. No tenant network is available for allocation.
Neutron server returns request_ids: ['req-0a6f0fa7-9808-44fa-8faa-c8af02e15e2d']

請檢查/etc/neutron/plugins/ml2/ml2_conf.ini下
[ml2_type_vxlan]是否有錯

[[email protected] ~]# neutron subnet-create --name selfservice \
>   --dns-nameserver 114.114.114.114 --gateway 10.0.0.1 \
>   selfservice 10.0.0.0/24
Created a new subnet:
+-------------------+--------------------------------------------+
| Field             | Value                                      |
+-------------------+--------------------------------------------+
| allocation_pools  | {"start": "10.0.0.2", "end": "10.0.0.254"} |
| cidr              | 10.0.0.0/24                                |
| created_at        | 2017-11-17T00:09:07                        |
| description       |                                            |
| dns_nameservers   | 114.114.114.114                            |
| enable_dhcp       | True                                       |
| gateway_ip        | 10.0.0.1                                   |
| host_routes       |                                            |
| id                | 105b6f53-b7c5-47c9-926c-e973bd8ad514       |
| ip_version        | 4                                          |
| ipv6_address_mode |                                            |
| ipv6_ra_mode      |                                            |
| name              | selfservice                                |
| network_id        | 57961b46-8023-4e74-a16d-c806deebbfd6       |
| subnetpool_id     |                                            |
| tenant_id         | 8cc1c04a21ae4165a1667e0bd5029831           |
| updated_at        | 2017-11-17T00:09:07                        |
+-------------------+--------------------------------------------+

建立路由

私有網路通過虛擬路由來連線到公有網路，以雙向NAT最為典型。每個路由包含至少一個連線到私有網路的介面以及一個連線到公有網路的閘道器的介面

公有提供網路必須包括 router: external（路由器：外部）選項，用來使路由連線到外部網路，比如網際網路。admin或者其他許可權使用者在網路建立時必須包括這個選項，也可以之後在新增。在裡把public公有網路設定成router: external。

. admin-openrc

[[email protected] ~]# neutron net-update provider --router:external
Updated network: provider

. demo-openrc

[[email protected] ~]# neutron router-create router
Created a new router:
+-------------------------+--------------------------------------+
| Field                   | Value                                |
+-------------------------+--------------------------------------+
| admin_state_up          | True                                 |
| availability_zone_hints |                                      |
| availability_zones      |                                      |
| description             |                                      |
| external_gateway_info   |                                      |
| id                      | 5ba88699-59ee-4dbc-ab5e-bdbdf9bb5d84 |
| name                    | router                               |
| routes                  |                                      |
| status                  | ACTIVE                               |
| tenant_id               | 8cc1c04a21ae4165a1667e0bd5029831     |
+-------------------------+--------------------------------------+