[ 1663.293968] br0: port 1(dummy0) entered blocking state
[ 1663.294004] br0: port 1(dummy0) entered disabled state
[ 1663.294041] dummy0: entered allmulticast mode
[ 1663.294089] dummy0: entered promiscuous mode
[ 1663.297111] br0: port 1(dummy0) entered blocking state
[ 1663.297143] br0: port 1(dummy0) entered forwarding state
[ 1663.492972] dummy0: left allmulticast mode
[ 1663.493038] dummy0: left promiscuous mode
[ 1663.493098] br0: port 1(dummy0) entered disabled state