[ 2019.138145][T12982] br0: port 1(dummy0) entered blocking state
[ 2019.138329][T12982] br0: port 1(dummy0) entered disabled state
[ 2019.138489][T12982] dummy0: entered allmulticast mode
[ 2019.139739][T12982] dummy0: entered promiscuous mode
[ 2019.174577][T12983] br0: port 1(dummy0) entered blocking state
[ 2019.174853][T12983] br0: port 1(dummy0) entered forwarding state
[ 2021.132723][   T12] dummy0: left allmulticast mode
[ 2021.133467][   T12] dummy0: left promiscuous mode
[ 2021.133693][   T12] br0: port 1(dummy0) entered disabled state