[  242.816117] br0: port 1(dummy0) entered blocking state
[  242.816126] br0: port 1(dummy0) entered disabled state
[  242.816211] device dummy0 entered promiscuous mode
[  242.873052] br0: port 1(dummy0) entered blocking state
[  242.873060] br0: port 1(dummy0) entered forwarding state
[  242.873111] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready