My support case is still open, no update since this response back in July:   " The Primary MX rebooted due to an issue that engineering is investigating. I've attached this case to our internal tracking for the issue. It affects firmware 16 and 17. Once there is an update I can report back." ... View more

I just subbed a ticket on this, out of nowhere we lost VRRP hearbeats and failed over to the standby.  There is a note in the firmware that the MX400s use 16.16.3 code if you take it up to 17, sounds like there will be another 16 patch.   ... View more

Were you able to get AWS DX implemented?  If so, what does your topology look like and what has your experience with it been like so far? ... View more