[ 2008.298260][T12033] br0: port 1(dummy0) entered blocking state
[ 2008.298474][T12033] br0: port 1(dummy0) entered disabled state
[ 2008.298654][T12033] dummy0: entered allmulticast mode
[ 2008.300207][T12033] dummy0: entered promiscuous mode
[ 2008.332092][T12034] br0: port 1(dummy0) entered blocking state
[ 2008.332516][T12034] br0: port 1(dummy0) entered forwarding state
[ 2010.907422][   T12] dummy0: left allmulticast mode
[ 2010.908333][   T12] dummy0: left promiscuous mode
[ 2010.908596][   T12] br0: port 1(dummy0) entered disabled state