Hi all,
Our wireless network has a backbone with 20 routers (RB600 and RB500), 7 of them are the main backbone and perform a ring. They use BGP. Routers had different routerOS versions, starting at 2.9.x till 3.17. Everything has worked OK for a long time. If any of the ring backbone routers had some problem, routing tables were updated in a few seconds in the right way.
This morning we've upgraded one single router to 3.18, and started to have issues. Routing tables started to loose routes. We've recovered the situation disabling the link between two of the 7 ring backbones (breaking the ring), and had to reboot most of the network's routers.
At this state, if we re-enabled the link between those two routers that perform the backbone ring, chaos raised again. We've decided to upgrade all network routers to 3.18. BGP works fine when backbone is not performing a ring. But each time we re-enable the ring, routing tables go to hell.
We need our ring back !