[ 2020.734625][ T2804] br0: port 1(dummy0) entered blocking state
[ 2020.734804][ T2804] br0: port 1(dummy0) entered disabled state
[ 2020.734965][ T2804] dummy0: entered allmulticast mode
[ 2020.735865][ T2804] dummy0: entered promiscuous mode
[ 2020.765444][ T2805] br0: port 1(dummy0) entered blocking state
[ 2020.765666][ T2805] br0: port 1(dummy0) entered forwarding state
[ 2022.643827][   T12] dummy0: left allmulticast mode
[ 2022.644793][   T12] dummy0: left promiscuous mode
[ 2022.645017][   T12] br0: port 1(dummy0) entered disabled state