[ 2221.543578][T18550] br0: port 1(dummy0) entered blocking state
[ 2221.543813][T18550] br0: port 1(dummy0) entered disabled state
[ 2221.544539][T18550] dummy0: entered allmulticast mode
[ 2221.545592][T18550] dummy0: entered promiscuous mode
[ 2221.570835][T18551] br0: port 1(dummy0) entered blocking state
[ 2221.571198][T18551] br0: port 1(dummy0) entered forwarding state
[ 2223.893965][   T68] dummy0: left allmulticast mode
[ 2223.894809][   T68] dummy0: left promiscuous mode
[ 2223.895156][   T68] br0: port 1(dummy0) entered disabled state