[ 2174.594784][ T4175] br0: port 1(dummy0) entered blocking state
[ 2174.594974][ T4175] br0: port 1(dummy0) entered disabled state
[ 2174.595136][ T4175] dummy0: entered allmulticast mode
[ 2174.596518][ T4175] dummy0: entered promiscuous mode
[ 2174.621214][ T4176] br0: port 1(dummy0) entered blocking state
[ 2174.621584][ T4176] br0: port 1(dummy0) entered forwarding state
[ 2176.499548][   T68] dummy0: left allmulticast mode
[ 2176.500069][   T68] dummy0: left promiscuous mode
[ 2176.500307][   T68] br0: port 1(dummy0) entered disabled state