[ 1688.809766] br0: port 1(dummy0) entered blocking state
[ 1688.809860] br0: port 1(dummy0) entered disabled state
[ 1688.809935] dummy0: entered allmulticast mode
[ 1688.810035] dummy0: entered promiscuous mode
[ 1688.813727] br0: port 1(dummy0) entered blocking state
[ 1688.813761] br0: port 1(dummy0) entered forwarding state
[ 1689.049842] dummy0: left allmulticast mode
[ 1689.049890] dummy0: left promiscuous mode
[ 1689.049932] br0: port 1(dummy0) entered disabled state