[ 2478.991238] br0: port 1(dummy0) entered disabled state
[ 2479.044714] br0: port 1(dummy0) entered listening state
[ 2480.158746] br0: port 1(dummy0) entered learning state
[ 2480.213999] br0: port 1(dummy0) entered forwarding state
[ 2480.270292] br0: port 1(dummy0) entered forwarding state
[ 2495.425897] br0: port 1(dummy0) entered disabled state
[ 2495.451049] br0: port 1(dummy0) entered blocking state
[ 2495.451057] br0: port 1(dummy0) entered listening state
[ 2516.090930] br0: port 1(dummy0) entered learning state
[ 2536.571002] br0: port 1(dummy0) entered forwarding state
[ 2536.571028] br0: topology change detected, propagating
[ 2555.703117] br0: port 1(dummy0) entered disabled state
[ 2555.721113] device dummy0 left promiscuous mode
[ 2555.721137] br0: port 1(dummy0) entered disabled state