[ 2256.379222][ T7528] br0: port 1(dummy0) entered blocking state
[ 2256.379467][ T7528] br0: port 1(dummy0) entered disabled state
[ 2256.379698][ T7528] dummy0: entered allmulticast mode
[ 2256.380690][ T7528] dummy0: entered promiscuous mode
[ 2256.408195][ T7529] br0: port 1(dummy0) entered blocking state
[ 2256.408483][ T7529] br0: port 1(dummy0) entered forwarding state
[ 2258.868318][   T12] dummy0: left allmulticast mode
[ 2258.869049][   T12] dummy0: left promiscuous mode
[ 2258.869372][   T12] br0: port 1(dummy0) entered disabled state