In this installation, physical network interface eth2 will be utilized as the provider interface for VLAN and flat networks. Neutron will be responsible for configuring VLAN interfaces off eth2 once the initial network configuration has been completed.
On the controller01 and compute01 nodes, configure the eth2 interface within the/etc/network/interfaces file as follows:
auto eth2
iface eth2 inet manual
Close and save the file, and bring the interface up with the following command:
# ip link set dev eth2 up
Confirm the interface is in an UP state using the ip link show dev eth2 command. If the interface is up, it is ready for use in bridges that Neutron will create and manage.
Because the interface will be used in a bridge, an IP address cannot be applied directly to the interface. If there is an IP address applied to eth2, it will become inaccessible once the interface is placed in a bridge. If an IP is required, consider moving it to an interface not required for Neutron networking.