[ 2187.151330][ T7534] br0: port 1(dummy0) entered blocking state
[ 2187.151532][ T7534] br0: port 1(dummy0) entered disabled state
[ 2187.151696][ T7534] dummy0: entered allmulticast mode
[ 2187.152556][ T7534] dummy0: entered promiscuous mode
[ 2187.183459][ T7535] br0: port 1(dummy0) entered blocking state
[ 2187.183835][ T7535] br0: port 1(dummy0) entered forwarding state
[ 2189.556825][   T12] dummy0: left allmulticast mode
[ 2189.557776][   T12] dummy0: left promiscuous mode
[ 2189.558028][   T12] br0: port 1(dummy0) entered disabled state