[ 2178.893933][T21881] br0: port 1(dummy0) entered blocking state
[ 2178.894124][T21881] br0: port 1(dummy0) entered disabled state
[ 2178.894285][T21881] dummy0: entered allmulticast mode
[ 2178.895227][T21881] dummy0: entered promiscuous mode
[ 2178.922724][T21882] br0: port 1(dummy0) entered blocking state
[ 2178.923231][T21882] br0: port 1(dummy0) entered forwarding state
[ 2180.882259][   T69] dummy0: left allmulticast mode
[ 2180.883027][   T69] dummy0: left promiscuous mode
[ 2180.883263][   T69] br0: port 1(dummy0) entered disabled state