[ 2123.565791][ T7963] br0: port 1(dummy0) entered blocking state
[ 2123.566098][ T7963] br0: port 1(dummy0) entered disabled state
[ 2123.566375][ T7963] dummy0: entered allmulticast mode
[ 2123.567353][ T7963] dummy0: entered promiscuous mode
[ 2123.599285][ T7964] br0: port 1(dummy0) entered blocking state
[ 2123.599591][ T7964] br0: port 1(dummy0) entered forwarding state
[ 2126.058190][   T12] dummy0: left allmulticast mode
[ 2126.058981][   T12] dummy0: left promiscuous mode
[ 2126.059305][   T12] br0: port 1(dummy0) entered disabled state