[ 1748.315256] br0: port 1(dummy0) entered blocking state
[ 1748.315296] br0: port 1(dummy0) entered disabled state
[ 1748.315337] dummy0: entered allmulticast mode
[ 1748.315388] dummy0: entered promiscuous mode
[ 1748.318906] br0: port 1(dummy0) entered blocking state
[ 1748.318944] br0: port 1(dummy0) entered forwarding state
[ 1748.568797] dummy0: left allmulticast mode
[ 1748.568875] dummy0: left promiscuous mode
[ 1748.568938] br0: port 1(dummy0) entered disabled state