5.6.2. 置备裸机节点时，裸机置备服务如何管理 VIF
在置备时，默认情况下，裸机置备服务(ironic)会尝试将所有支持 PXE 的端口附加到 provisioning 网络。如果启用了 neutron.add_all_ports，Bare Metal Provisioning 服务会尝试将所有端口绑定到所需的服务网络。
在调配裸机节点后，在裸机节点移到 ACTIVE provisioning 状态之前，之前连接的端口将 unbound。unbinding 的进程取决于网络接口：
-
扁平：所有请求的 VIF 具有所有状态下的所有绑定配置都未绑定。 -
Neutron：云用户请求的 VIF 首次附加到裸机节点，因为置备过程中创建的裸机置备服务的 VIF 已被删除。
相同的流和逻辑适用于清理、服务和救援进程。
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