[ 2250.375437][T22800] br0: port 1(dummy0) entered blocking state
[ 2250.375812][T22800] br0: port 1(dummy0) entered disabled state
[ 2250.376181][T22800] dummy0: entered allmulticast mode
[ 2250.377274][T22800] dummy0: entered promiscuous mode
[ 2250.418714][T22801] br0: port 1(dummy0) entered blocking state
[ 2250.419593][T22801] br0: port 1(dummy0) entered forwarding state
[ 2253.027001][   T12] dummy0: left allmulticast mode
[ 2253.027858][   T12] dummy0: left promiscuous mode
[ 2253.028267][   T12] br0: port 1(dummy0) entered disabled state