[ 1918.046275][ T9320] br0: port 1(dummy0) entered blocking state
[ 1918.046473][ T9320] br0: port 1(dummy0) entered disabled state
[ 1918.046660][ T9320] dummy0: entered allmulticast mode
[ 1918.047674][ T9320] dummy0: entered promiscuous mode
[ 1918.075176][ T9321] br0: port 1(dummy0) entered blocking state
[ 1918.075430][ T9321] br0: port 1(dummy0) entered forwarding state
[ 1919.902763][   T12] dummy0: left allmulticast mode
[ 1919.903442][   T12] dummy0: left promiscuous mode
[ 1919.903664][   T12] br0: port 1(dummy0) entered disabled state