[ 2034.233211][ T7753] br0: port 1(dummy0) entered blocking state
[ 2034.233407][ T7753] br0: port 1(dummy0) entered disabled state
[ 2034.233576][ T7753] dummy0: entered allmulticast mode
[ 2034.234515][ T7753] dummy0: entered promiscuous mode
[ 2034.264132][ T7754] br0: port 1(dummy0) entered blocking state
[ 2034.264489][ T7754] br0: port 1(dummy0) entered forwarding state
[ 2036.290250][   T12] dummy0: left allmulticast mode
[ 2036.291049][   T12] dummy0: left promiscuous mode
[ 2036.291438][   T12] br0: port 1(dummy0) entered disabled state