[ 2161.229158][ T9453] br0: port 1(dummy0) entered blocking state
[ 2161.229346][ T9453] br0: port 1(dummy0) entered disabled state
[ 2161.229490][ T9453] dummy0: entered allmulticast mode
[ 2161.230455][ T9453] dummy0: entered promiscuous mode
[ 2161.259626][ T9454] br0: port 1(dummy0) entered blocking state
[ 2161.259995][ T9454] br0: port 1(dummy0) entered forwarding state
[ 2163.174580][   T12] dummy0: left allmulticast mode
[ 2163.175558][   T12] dummy0: left promiscuous mode
[ 2163.175773][   T12] br0: port 1(dummy0) entered disabled state