红帽全球峰会3.2. VXLAN 置备网络
在本例中，director 通过 provisioning 网络部署新的 overcloud 节点，并使用 VXLAN 隧道在第 3 层拓扑间跨级别部署（请参阅 图 3.2 “VXLAN 置备网络拓扑”）。这允许 director 的 DHCP 服务器将 DHCPOFFER 广播发送到任何 leaf。要建立此隧道，请在 Top-of-Rack (ToR) leaf switches 上配置 VXLAN 端点。
图 3.2. VXLAN 置备网络拓扑
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