[ 2018.115754][ T7737] br0: port 1(dummy0) entered blocking state
[ 2018.116002][ T7737] br0: port 1(dummy0) entered disabled state
[ 2018.116229][ T7737] dummy0: entered allmulticast mode
[ 2018.117901][ T7737] dummy0: entered promiscuous mode
[ 2018.141876][ T7738] br0: port 1(dummy0) entered blocking state
[ 2018.142123][ T7738] br0: port 1(dummy0) entered forwarding state
[ 2019.976870][   T12] dummy0: left allmulticast mode
[ 2019.977168][   T12] dummy0: left promiscuous mode
[ 2019.977397][   T12] br0: port 1(dummy0) entered disabled state