Thanks for your help.
I updated my openhab to the latest snapshot in Openhabian.
I aslo updated my router to firmware version 3. with help of your post HowTo: GIRA KNX/IP Router.
Maybe you can update these post with the TLS deactive workaround http://www.gira.com/en/service/download/download.html?id=2836
I cannot add a IP dummy is my toplogy. When i create a new project it’s possible to add a dummy in a ip line. Maybe it’s a bug in ETS.
I don’t have any problems with the same router in OH1. I cannot explain that.
My karaf output is:
openhab> config:edit org.openhab.knx
openhab> config:property-list
autoReconnectPeriod = 30
busaddr = 1.2.200
ignorelocalevents = true
ip = 224.0.23.12
localIp = 192.168.1.120
maxRefreshQueueEntries = 10000
numberOfThreads = 5
pause = 50
port = 3671
readRetries = 3
scheduledExecutorServiceShutdownTimeoutString = 5
service.pid = org.openhab.knx
timeout = 10000
type = ROUTER
It seems that switches the value is now sent only 1 time. with dimmers 2 more times.