Hope this helps, support could not fiond the issue, but after looking in our logs we saw NBAR was blocking randomly traffic (ourselves, because their helpdesk didnt know what else to do)  We disabled the PtoP blocking on the NBAR (activated by default on a Firmware update and the Customer supoport doenst know it, we didnt even know what NBAR was). This fixed the issue for us.   Customer support was insisting it was our traffic shaping and we had to check our own configs. Is the seccond time we get screwed by a firmware update enabling features/ services.  Sorry but my last 2 experiences with helpdesk have been quiote bad 4 and 3 hours to the drain to end up fixing it ourselves, and we are not network experts. Just by poking the right places and knowing their services.  ... View more