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Configuring the overlay interface

In this installation, physical network interface eth1 will be utilized as the overlay interface for overlay networks using VXLAN. Neutron will be responsible for configuring VXLAN interfaces once the initial network configuration has been completed.

On the controller01 and compute01 nodes, configure the eth1 interface within the /etc/network/interfaces file as follows:

auto eth1
iface eth1 inet static
    address 10.20.0.X/24

Close and save the file, and bring the interface up with the following command:

    # ip link set dev eth1 up

Confirm the interface is in an UP state and that the address has been set using the ip addr show dev eth1 command. Ensure both hosts can communicate over the newly configured interface by pinging compute01 from the controller01 node:

If you experience any issues communicating across this interface, you will experience issues with VXLAN networks created with OpenStack Networking. Any issues should be corrected before continuing.