[ 2020.578060][T23751] br0: port 1(dummy0) entered blocking state
[ 2020.578279][T23751] br0: port 1(dummy0) entered disabled state
[ 2020.578471][T23751] dummy0: entered allmulticast mode
[ 2020.579695][T23751] dummy0: entered promiscuous mode
[ 2020.610450][T23752] br0: port 1(dummy0) entered blocking state
[ 2020.610727][T23752] br0: port 1(dummy0) entered forwarding state
[ 2022.533135][   T12] dummy0: left allmulticast mode
[ 2022.533466][   T12] dummy0: left promiscuous mode
[ 2022.533692][   T12] br0: port 1(dummy0) entered disabled state