[ 1941.028325][ T1840] br0: port 1(dummy0) entered blocking state
[ 1941.028498][ T1840] br0: port 1(dummy0) entered disabled state
[ 1941.028644][ T1840] dummy0: entered allmulticast mode
[ 1941.029733][ T1840] dummy0: entered promiscuous mode
[ 1941.053122][ T1841] br0: port 1(dummy0) entered blocking state
[ 1941.053398][ T1841] br0: port 1(dummy0) entered forwarding state
[ 1943.013976][   T12] dummy0: left allmulticast mode
[ 1943.015090][   T12] dummy0: left promiscuous mode
[ 1943.015376][   T12] br0: port 1(dummy0) entered disabled state