ubuntu@maas:~$ ip a s
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:25:90:52:3c:d6 brd ff:ff:ff:ff:ff:ff
3: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:25:90:52:3c:d7 brd ff:ff:ff:ff:ff:ff
    inet 169.254.0.1/24 brd 169.254.0.255 scope global enp2s0
       valid_lft forever preferred_lft forever
    inet6 fe80::225:90ff:fe52:3cd7/64 scope link
       valid_lft forever preferred_lft forever
4: enp5s0f0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:e0:ed:56:fb:7c brd ff:ff:ff:ff:ff:ff
    inet 10.128.0.172/24 brd 10.128.0.255 scope global enp5s0f0
       valid_lft forever preferred_lft forever
    inet6 fe80::2e0:edff:fe56:fb7c/64 scope link
       valid_lft forever preferred_lft forever
5: enp5s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:e0:ed:56:fb:7d brd ff:ff:ff:ff:ff:ff
6: enp7s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:e0:ed:56:fb:7e brd ff:ff:ff:ff:ff:ff
7: enp7s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 00:e0:ed:56:fb:7f brd ff:ff:ff:ff:ff:ff


ubuntu@maas:~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto enp5s0f0
iface enp5s0f0 inet static
        address 10.128.0.172
        netmask 255.255.255.0
        network 10.128.0.0
        broadcast 10.128.0.255
        gateway 10.128.0.1
        # dns-* options are implemented by the resolvconf package, if installed
        dns-nameservers 10.128.0.25
        dns-search sandvine.com

# The pxe network interface
auto enp2s0
iface enp2s0 inet static
        address 169.254.0.1
        netmask 255.255.255.0
        network 169.254.0.0
        broadcast 169.254.0.255
        gateway 169.254.0.1