[ 1756.244118] br0: port 1(dummy0) entered blocking state
[ 1756.244150] br0: port 1(dummy0) entered disabled state
[ 1756.244172] dummy0: entered allmulticast mode
[ 1756.244208] dummy0: entered promiscuous mode
[ 1756.247440] br0: port 1(dummy0) entered blocking state
[ 1756.247465] br0: port 1(dummy0) entered forwarding state
[ 1756.498172] dummy0: left allmulticast mode
[ 1756.498229] dummy0: left promiscuous mode
[ 1756.498281] br0: port 1(dummy0) entered disabled state