[ 2720.763159] br0: port 1(dummy0) entered blocking state
[ 2720.763170] br0: port 1(dummy0) entered disabled state
[ 2720.763267] device dummy0 entered promiscuous mode
[ 2720.810068] br0: port 1(dummy0) entered blocking state
[ 2720.810074] br0: port 1(dummy0) entered forwarding state
[ 2720.810104] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready