[ 2397.112424][T20323] br0: port 1(dummy0) entered blocking state
[ 2397.113150][T20323] br0: port 1(dummy0) entered disabled state
[ 2397.113468][T20323] dummy0: entered allmulticast mode
[ 2397.114540][T20323] dummy0: entered promiscuous mode
[ 2397.140891][T20324] br0: port 1(dummy0) entered blocking state
[ 2397.141187][T20324] br0: port 1(dummy0) entered forwarding state
[ 2399.607380][   T12] dummy0: left allmulticast mode
[ 2399.607788][   T12] dummy0: left promiscuous mode
[ 2399.608178][   T12] br0: port 1(dummy0) entered disabled state