[ 2234.418877][ T4341] br0: port 1(dummy0) entered blocking state
[ 2234.419086][ T4341] br0: port 1(dummy0) entered disabled state
[ 2234.419250][ T4341] dummy0: entered allmulticast mode
[ 2234.420623][ T4341] dummy0: entered promiscuous mode
[ 2234.445318][ T4342] br0: port 1(dummy0) entered blocking state
[ 2234.446055][ T4342] br0: port 1(dummy0) entered forwarding state
[ 2236.834844][   T12] dummy0: left allmulticast mode
[ 2236.835818][   T12] dummy0: left promiscuous mode
[ 2236.836062][   T12] br0: port 1(dummy0) entered disabled state