Hello, thanks for your replies. This is really interesting, especially @MartinLL 's SNORT investigation. After disabling IDS I had no route change events and network outages since 10 days. This is the longest period of time so far since we started working on the problem. Hopping that we got rid of it, I think.I can do without IDS. ... View more

Hello, could you confirm that disabling IDS solved this issue? We have a similar problem using MX95 with a couple of network outages a day (approx. 20 / week) showing the same route connection change messages that includes all of our other routers within the LAN, but typically not the uplink (which is not a Fortigate device but a Unifi Edgerouter). Generally, our topology is quite different using a warm spare and a MS225-48LP as root switch for approx. 50 Unifi switches, but I am desperately looking for any clues to this problem. ... View more