[ 2151.540953][ T4720] br0: port 1(dummy0) entered blocking state
[ 2151.541190][ T4720] br0: port 1(dummy0) entered disabled state
[ 2151.541409][ T4720] dummy0: entered allmulticast mode
[ 2151.542339][ T4720] dummy0: entered promiscuous mode
[ 2151.565460][ T4721] br0: port 1(dummy0) entered blocking state
[ 2151.565640][ T4721] br0: port 1(dummy0) entered forwarding state
[ 2153.840976][   T69] dummy0: left allmulticast mode
[ 2153.841161][   T69] dummy0: left promiscuous mode
[ 2153.841380][   T69] br0: port 1(dummy0) entered disabled state