Learning OpenStack Networking - Third Edition

Configuring the overlay interface

In this installation, physical network interface eth1 will be utilized as the overlay interface for overlay networks using VXLAN. For VXLAN networking, this is the equivalent of the VXLAN tunnel endpoint, or VTEP. Neutron will be responsible for configuring some aspects of Open vSwitch once the initial network configuration has been completed.

On all hosts, configure the eth1 interface within the /etc/network/interfaces file, if it has not already been done:

auto eth1iface eth1 inet static  address 10.20.0.X/24 

Use the following table for the appropriate address. Substitute the address with X where appropriate:

Host	Address
compute02	10.20.0.102
compute03	10.20.0.103
snat01	10.20.0.104 ...