[ 1834.574300] br0: port 1(dummy0) entered blocking state
[ 1834.574359] br0: port 1(dummy0) entered disabled state
[ 1834.574413] dummy0: entered allmulticast mode
[ 1834.574489] dummy0: entered promiscuous mode
[ 1834.577746] br0: port 1(dummy0) entered blocking state
[ 1834.577771] br0: port 1(dummy0) entered forwarding state
[ 1834.819820] dummy0: left allmulticast mode
[ 1834.819841] dummy0: left promiscuous mode
[ 1834.819859] br0: port 1(dummy0) entered disabled state