[ 1607.434309] br0: port 1(dummy0) entered blocking state
[ 1607.434393] br0: port 1(dummy0) entered disabled state
[ 1607.434465] dummy0: entered allmulticast mode
[ 1607.434563] dummy0: entered promiscuous mode
[ 1607.437651] br0: port 1(dummy0) entered blocking state
[ 1607.437700] br0: port 1(dummy0) entered forwarding state
[ 1607.632680] dummy0: left allmulticast mode
[ 1607.632755] dummy0: left promiscuous mode
[ 1607.632792] br0: port 1(dummy0) entered disabled state