[ 2018.573462][T14469] br0: port 1(dummy0) entered blocking state
[ 2018.573663][T14469] br0: port 1(dummy0) entered disabled state
[ 2018.573835][T14469] dummy0: entered allmulticast mode
[ 2018.574751][T14469] dummy0: entered promiscuous mode
[ 2018.610228][T14470] br0: port 1(dummy0) entered blocking state
[ 2018.610458][T14470] br0: port 1(dummy0) entered forwarding state
[ 2020.477891][   T12] dummy0: left allmulticast mode
[ 2020.478142][   T12] dummy0: left promiscuous mode
[ 2020.478360][   T12] br0: port 1(dummy0) entered disabled state