[ 1838.568294][ T9455] br0: port 1(dummy0) entered blocking state
[ 1838.568560][ T9455] br0: port 1(dummy0) entered disabled state
[ 1838.568790][ T9455] dummy0: entered allmulticast mode
[ 1838.570043][ T9455] dummy0: entered promiscuous mode
[ 1838.598694][ T9456] br0: port 1(dummy0) entered blocking state
[ 1838.599246][ T9456] br0: port 1(dummy0) entered forwarding state
[ 1840.371999][   T12] dummy0: left allmulticast mode
[ 1840.372296][   T12] dummy0: left promiscuous mode
[ 1840.372648][   T12] br0: port 1(dummy0) entered disabled state