[ 2175.475265][ T3841] br0: port 1(dummy0) entered blocking state
[ 2175.475481][ T3841] br0: port 1(dummy0) entered disabled state
[ 2175.475658][ T3841] dummy0: entered allmulticast mode
[ 2175.476634][ T3841] dummy0: entered promiscuous mode
[ 2175.501809][ T3842] br0: port 1(dummy0) entered blocking state
[ 2175.502053][ T3842] br0: port 1(dummy0) entered forwarding state
[ 2178.047622][   T12] dummy0: left allmulticast mode
[ 2178.047899][   T12] dummy0: left promiscuous mode
[ 2178.048190][   T12] br0: port 1(dummy0) entered disabled state