hello netadmingr,
My all my routers are Cisco Catalyst 3750 (in my testing environment). However in our live Backbone network we use Cisco Catalyst 7609.
So all are Cisco 3750 presently & i have set their priority as lowest (4096) compared to Mikrotik-CRS (8000hex = 32768) so that the core router becomes the root bridge.
But my core router is the root bridge & also the Mikrotik shows as root, leading to all ports to in DESIGNATED FORWARDING state. (not a loop free topology).
Note: All are connected by fiber patch-cords.
However in your case, CCR is good for routing purposes, rather then CRS...which is good for switching. Being which i'm still stuck here on STP !!!!!
Provide me a solution if you have
Thank you