I have a ticket open and unfortunately support doesn't have an answer at this time.  I have approximately 60 Catalyst 9300 series switches, most in stacks onboarded to the Meraki cloud.  Last night at the exact same time 9 locations had their switch/stack go offline and unreachable.   A review of the affected switches shows they are all working and passing traffic locally and all devices have Internet access.  We were able to reboot a switch at a site with no one working and the switch imemdiately came back online after the reboot. We opened the ticket with support to hopefully avoid having to reboot the remaining affected devices and support had limited suggestions as the devices in question are offline and the device I rebooted is back online however like with a Meraki MS switch once rebooted all logs are flushed and provide no additional help to support. To complicate matters more is the fact that I have other like model stacks and single switches all on the same management vlan and some additional stacks at the same physical locations appearing online, while a few others remain offline.   I have seen in the past issues with cloud connectivity that show me devices scattered throughout the WAN reporting down, however internal testing showed otherwise.  In all previous instances of this all switches that showed down for no reason, came back online at some point in the day for no reason, however not this last outage, which has the remaining switches that went down still reporting unreachable. Meraki support was going to try and engage some additonal support from the Cisco side and I agreed that I will reboot all remaining affected switches but 1 to get them back up and monitoring and leave one switch unreachable for additional troubleshooting with support. Anyoe else have any similar experience with some of their enterprise Catalyst switches going down when like devices at the same site remain up?   Thanks,   Mark  ... View more