[ 1709.638762] br0: port 1(dummy0) entered blocking state
[ 1709.638833] br0: port 1(dummy0) entered disabled state
[ 1709.638899] dummy0: entered allmulticast mode
[ 1709.638983] dummy0: entered promiscuous mode
[ 1709.642254] br0: port 1(dummy0) entered blocking state
[ 1709.642283] br0: port 1(dummy0) entered forwarding state
[ 1709.853292] dummy0: left allmulticast mode
[ 1709.853330] dummy0: left promiscuous mode
[ 1709.853363] br0: port 1(dummy0) entered disabled state