I've tried to troubleshoot some of these and didn't make the connection but in hindsight, I do remember iPhones being the devices linked to these. That's good stuff to know!    Thanks! ... View more

@Dennb10  What IOS-XE version is running on the Catalyst? Are all the other APs that are working all MR45s and are the other Catalysts running the same IOS-XE version? Are there any messages related to PoE in the Catalyst event log? I think you're probably better off troubleshooting this from the Catalyst side. I know there have been bugs in IOS-XE where the LLDP power negotiation doesn't work correctly with some devices. ... View more

Just to keep you updated - spoke with a support engineer who was very helpful. He could capture/witness the roaming issue from watching the logs and is going to try to replicate the issue using a testing set-up.    Meanwhile I also did some testing of my own. Fully disabling 802.11w for affected SSID (instead of 'Enabled - allow unsupported clients') seems to have solved the roaming issues. This also solved an issue where the iPhone would be unable to associate with the network when connecting to the SSID for the first time. (eventually after reconnecting many, many times, it would successfully connect) I'm interested to see if my findings are in line with the testing results from Meraki Support  Also, for security reasons I would like to be able to set 802.11w to 'Enabled - allow unsupported clients' again without it affecting roaming capabilities. Please note that per Apple's documentation: "802.11w's protected management frames (PMF) interoperate with iOS and iPadOS support for 802.11k, 802.11r, and 802.11v." (https://support.apple.com/en-us/HT202628). ... View more