Marcel,
Sorry to see your thread unanswerred till now. I was just searching for similar information & came across this thread. Not sure if you already got the information you needed but if not yet, here you go with one such thread with good discussion. https://supportforums.cisco.com/message/3488720#3488720
If you have additional information, pls be kind to keep the forum posted either on this or above thread so that the community is informed.
Pls rate the post if it helps.
GP.
