Hello guys,   We have the following network topology but, we struggle with the RSTP configuration. (We have this topology to provide a maximum redundancy on the network and followed the recommendations from Meraki Documentation : https://documentation.meraki.com/MX/Deployment_Guides/MX_Warm_Spare_-_High_Availability_Pair#Requirements_and_Best_Practices     Red links are the ones we expected to be active when everything is ok and the blue are the redundant ones. Ports 47 & 48 are defined in trunk mode and have the following options also activated : Unidirectional link detection  &  Loop guard    We have activated RSTP on the switches to avoid loop, but it seems to not do the right thing. We also set the RSTP Priority to 0 on Switch 1 so it is the root bridge. In fact, RSTP is blocking the Port 48 on Switches 2 to 8 (Which was supposed to be the main link to the Primary MX250) Which makes the traffic coming from switches 2 to 8 to go through the Secondary MX250 (which is in passive mode) then go through switch 1 and finally to the Primary MX250, instead of using the direct link available...   How can we fix this, what are we missing ? Would it be possible for example to do the following ? - Set the secondary uplinks to only be used if the Primary MX goes down or, - Set the spare MX250 to not do any switching while it's in passive mode.   Thanks for your help ! ... View more