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Description of problem: fail to add ovs if port name contains more than 5 characters Version-Release number of selected component (if applicable): nmstate-0.0.7-1.el8.noarch How reproducible: Always Steps to Reproduce: 1. ip link add veth0_c type veth 2. add ovs with following yaml --- interfaces: - name: veth0_c type: ethernet state: up - name: ovs-br0 type: ovs-bridge state: up bridge: options: fail-mode: '' mcast-snooping-enable: false rstp: false stp: true port: - name: veth0_c type: system Actual results: utoconnect_slaves: <enum NM_SETTING_CONNECTION_AUTOCONNECT_SLAVES_YES of type NM.SettingConnectionAutoconnectSlaves> 2019-07-03 05:27:04,045 root DEBUG Executing NM action: func=add_connection_async 2019-07-03 05:27:04,052 root DEBUG Connection adding succeeded: dev=veth0_c 2019-07-03 05:27:04,052 root DEBUG Executing NM action: func=add_connection_async 2019-07-03 05:27:04,053 root ERROR NM main-loop aborted: Connection adding failed: error=nm-connection-error-quark: connection.interface-name: 'ovs-port-veth0_c': interface name is longer than 15 characters (7) 2019-07-03 05:27:04,064 root DEBUG Checkpoint /org/freedesktop/NetworkManager/Checkpoint/35 rollback executed: dbus.Dictionary({dbus.String('/org/freedesktop/NetworkManager/Devices/1'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/2'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/66'): dbus.UInt32(0), dbus.String('/org/freedesktop/NetworkManager/Devices/67'): dbus.UInt32(0)}, signature=dbus.Signature('su')) Traceback (most recent call last): File "/usr/bin/nmstatectl", line 11, in <module> load_entry_point('nmstate==0.0.7', 'console_scripts', 'nmstatectl')() File "/usr/lib/python3.6/site-packages/nmstatectl/nmstatectl.py", line 59, in main return args.func(args) File "/usr/lib/python3.6/site-packages/nmstatectl/nmstatectl.py", line 187, in apply args.timeout) File "/usr/lib/python3.6/site-packages/nmstatectl/nmstatectl.py", line 206, in apply_state checkpoint = libnmstate.apply(state, verify_change, commit, timeout) File "/usr/lib/python3.6/site-packages/libnmstate/netapplier.py", line 59, in apply state.State(desired_state), verify_change, commit, rollback_timeout) File "/usr/lib/python3.6/site-packages/libnmstate/netapplier.py", line 132, in _apply_ifaces_state _edit_interfaces(state2edit) File "/usr/lib64/python3.6/contextlib.py", line 88, in __exit__ next(self.gen) File "/usr/lib/python3.6/site-packages/libnmstate/netapplier.py", line 184, in _setup_providers mainloop.error)) libnmstate.error.NmstateLibnmError: Unexpected failure of libnm when running the mainloop: run execution Expected results: pass Additional info: