[ 2103.291547][ T7456] br0: port 1(dummy0) entered blocking state
[ 2103.291734][ T7456] br0: port 1(dummy0) entered disabled state
[ 2103.291894][ T7456] dummy0: entered allmulticast mode
[ 2103.292735][ T7456] dummy0: entered promiscuous mode
[ 2103.322521][ T7457] br0: port 1(dummy0) entered blocking state
[ 2103.322775][ T7457] br0: port 1(dummy0) entered forwarding state
[ 2105.306695][   T12] dummy0: left allmulticast mode
[ 2105.307598][   T12] dummy0: left promiscuous mode
[ 2105.307822][   T12] br0: port 1(dummy0) entered disabled state