Initial network configuration
To understand how networking should initially be configured on each host, refer to the following diagram:
Figure 2.1
In the preceding diagram, three interfaces are cabled to each host. The eth0 interface will serve as the management interface for OpenStack services and API access. The eth1 interface will be used for overlay network traffic between hosts. On the controller node, eth2 will be used for external network traffic to instances through Neutron routers. If VLAN tenant networks are used in lieu of overlay networks such as VXLAN and GRE, then eth2 will be configured on the compute nodes to support those networks. ...
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