Comment 2 for bug 1701417

Jun 30 02:02:39 localhost kernel: Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
Jun 30 02:02:39 localhost kernel: bond0: Setting MII monitoring interval to 100
Jun 30 02:02:39 localhost kernel: bond0: Setting xmit hash policy to layer2 (0)
Jun 30 02:02:39 localhost network: Bringing up interface bond0: ERROR : [/etc/sysconfig/network-scripts/ifup-eth] Device bond0 has different MAC address than expected, ignoring.
Jun 30 02:02:39 localhost /etc/sysconfig/network-scripts/ifup-eth: Device bond0 has different MAC address than expected, ignoring.
Jun 30 02:02:39 localhost network: [FAILED]
Jun 30 02:02:39 localhost systemd: network.service: control process exited, code=exited status=1
Jun 30 02:02:39 localhost systemd: Failed to start LSB: Bring up/down networking.
Jun 30 02:02:39 localhost systemd: Unit network.service entered failed state.
Jun 30 02:02:39 localhost systemd: network.service failed.

In centos7; it doesn't like it when you specify a mac address for the bond itself (rather the bond will pick a mac from the slaves.

MAAS can *not* send a mac for a bond (unless someone is being explicit in the UI that they expect the bond to have a mac of <mac>).