[ 1674.204235][ T8642] br0: port 1(dummy0) entered blocking state
[ 1674.204377][ T8642] br0: port 1(dummy0) entered disabled state
[ 1674.204573][ T8642] dummy0: entered allmulticast mode
[ 1674.205057][ T8642] dummy0: entered promiscuous mode
[ 1674.219201][ T8643] br0: port 1(dummy0) entered blocking state
[ 1674.219323][ T8643] br0: port 1(dummy0) entered forwarding state
[ 1675.459296][   T68] dummy0: left allmulticast mode
[ 1675.459423][   T68] dummy0: left promiscuous mode
[ 1675.459585][   T68] br0: port 1(dummy0) entered disabled state