We suggest to add rules in ‘/etc/dbus-1/system.d/teamd.conf’.
The text of error message is : Aug 27 06:24:03 deb-build NetworkManager[2920]: <info> [1472293443.3106] device (team0): state change: disconnected -> prepare (reason 'none') [30 40 0] Aug 27 06:24:03 deb-build NetworkManager[2920]: <info> [1472293443.3497] device (team0): Activation: (team) started teamd [pid 3433]... Aug 27 06:24:03 deb-build NetworkManager[2920]: <info> [1472293443.3913] devices added (path: /sys/devices/virtual/net/team0, iface: team0) Aug 27 06:24:03 deb-build NetworkManager[2920]: <info> [1472293443.3921] device added (path: /sys/devices/virtual/net/team0, iface: team0): no ifupdown configuration found. Aug 27 06:24:03 deb-build NetworkManager[2920]: This program is not intended to be run as root. Aug 27 06:24:03 deb-build NetworkManager[2920]: TX balancing disabled. Aug 27 06:24:03 deb-build NetworkManager[2920]: dbus: Failed to acquire org.libteam.teamd.team0: org.freedesktop.DBus.Error.AccessDenied: Connection ":1.42" is not allowed to own the service "org.libteam.teamd.team0" due to security policies in the configuration file Aug 27 06:24:03 deb-build NetworkManager[2920]: Failed to expose dbus name. Aug 27 06:24:03 deb-build NetworkManager[2920]: teamd_init() failed. Aug 27 06:24:03 deb-build kernel: [ 348.441312] team0: Mode changed to "loadbalance" Aug 27 06:24:03 deb-build NetworkManager[2920]: Failed: Invalid argument Aug 27 06:24:03 deb-build NetworkManager[2920]: <warn> [1472293443.4331] device (team0): teamd process quit unexpectedly; failing activation Aug 27 06:24:03 deb-build NetworkManager[2920]: <info> [1472293443.4331] device (team0): state change: prepare -> failed (reason 'teamd-control-failed') [40 120 56] Steps to reproduce: (suppose that the system has 2 network cards) apt-get install network-manager libteam-utils nmcli con del enp0s8 nmcli con del enp0s9 nmcli c a con-name team0 type team ifname team0 config '{"runner": {"name": "loadbalance"}}' nmcli c m team0 connection.autoconnect-slaves 1 nmcli c a con-name team0-eth1 type team-slave ifname enp0s8 master team0 nmcli c a con-name team0-eth2 type team-slave ifname enp0s9 master team0 nmcli c u team0 -- Best Regards, Charles Malaheenee