[ 1830.111576][T18000] br0: port 1(dummy0) entered blocking state
[ 1830.111775][T18000] br0: port 1(dummy0) entered disabled state
[ 1830.111935][T18000] dummy0: entered allmulticast mode
[ 1830.112781][T18000] dummy0: entered promiscuous mode
[ 1830.137477][T18001] br0: port 1(dummy0) entered blocking state
[ 1830.137778][T18001] br0: port 1(dummy0) entered forwarding state
[ 1832.094635][   T12] dummy0: left allmulticast mode
[ 1832.095731][   T12] dummy0: left promiscuous mode
[ 1832.095965][   T12] br0: port 1(dummy0) entered disabled state