红帽全球峰会5.5.3.2. VLANs
VLAN 将作为带有特定 VLAN ID (VID)字段值的特定物理网络上的数据包实现。共享同一物理网络的 VLAN 网络相互隔离 L2，甚至可以有重叠的 IP 地址空间。支持 VLAN 网络的每个不同物理网络都被视为单独的 VLAN 中继，但有不同的 VID 值空间。有效的 VID 值是 1 到 4094。
VLAN 配置复杂性取决于您的 OpenStack 设计要求。要允许 OpenStack 网络更有效地使用 VLAN，您必须分配 VLAN 范围（每个项目一个），并将每个 Compute 节点物理交换机端口转换为 VLAN 中继端口。
注意
如果您希望网络支持超过 4094 项目，则建议通过 VLAN 进行 L2 隧道配置。
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