[ 1555.457528] br0: port 1(dummy0) entered blocking state
[ 1555.457610] br0: port 1(dummy0) entered disabled state
[ 1555.457676] dummy0: entered allmulticast mode
[ 1555.457759] dummy0: entered promiscuous mode
[ 1555.460533] br0: port 1(dummy0) entered blocking state
[ 1555.460567] br0: port 1(dummy0) entered forwarding state
[ 1555.640144] dummy0: left allmulticast mode
[ 1555.640173] dummy0: left promiscuous mode
[ 1555.640200] br0: port 1(dummy0) entered disabled state