[ 2021.487574][ T8343] br0: port 1(dummy0) entered blocking state
[ 2021.488238][ T8343] br0: port 1(dummy0) entered disabled state
[ 2021.488451][ T8343] dummy0: entered allmulticast mode
[ 2021.489464][ T8343] dummy0: entered promiscuous mode
[ 2021.518461][ T8344] br0: port 1(dummy0) entered blocking state
[ 2021.518798][ T8344] br0: port 1(dummy0) entered forwarding state
[ 2023.521174][   T12] dummy0: left allmulticast mode
[ 2023.522302][   T12] dummy0: left promiscuous mode
[ 2023.522533][   T12] br0: port 1(dummy0) entered disabled state