In this installation, physical network interface eth2 will be utilized as the provider interface for bridging purposes.
On compute02, compute03, and snat01, 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
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. The bridge will be created later on in this chapter.