[ 1838.334999] br0: port 1(dummy0) entered blocking state
[ 1838.335075] br0: port 1(dummy0) entered disabled state
[ 1838.335144] dummy0: entered allmulticast mode
[ 1838.335229] dummy0: entered promiscuous mode
[ 1838.338674] br0: port 1(dummy0) entered blocking state
[ 1838.338709] br0: port 1(dummy0) entered forwarding state
[ 1838.590947] dummy0: left allmulticast mode
[ 1838.590987] dummy0: left promiscuous mode
[ 1838.591014] br0: port 1(dummy0) entered disabled state