Switches on network see all devices in network as direct-connect clients

[TMaki]

Inherited this network from a previous engineer, I THINK I know what's going on but I need another set of eyes.

We have a small network, an MX95 firewall performing L3 duties, three switches direct-connected to it (A, B, and C), and two more switches downstream from A (A1 and A2). Switch A has access clients as well as the switch A1 and A2 trunks. RTSP is globally enabled, switch A is root-0 and no other device has bridge priority assigned to it, which I think is the root cause for what's going on: Switches B and C see every single device in the network as direct-connection devices, and when I go to check the physical path of a connection it almost always shows me that the device path is device-B/C-MX95 until I refresh a few times, at which point it gives me the correct path (usually something like device-AP-A1/A2-A-MX95).

Additionally, there is a LOT of mac flapping going on on the network, most of it occurring between AP ports on switch A and trunk ports either up to the MX or down to A1 or A2

If I'm correct and this is an RTSP issue?

[PhilipDAth]

What would help is if you made one switch the "core" switch.  Plug that into the MX95, and then plug all other switches into that core switch.

[TMaki]

Yeah at this point I've come to terms with that, but it's a warehouse environment and 'downtime' to make that kind of change is... hard to come by.

[Ryan_Miles]

A wireless client roaming between APs will cause MAC flap events in the MS event log. It's normal.

Is MS uplink sampling disabled? https://documentation.meraki.com/MS/Monitoring_and_Reporting/MS_Client_Sampling_on_Uplink_Configurat...

[TMaki]

Client sampling is set to all interfaces and client tracking on the MX95 is set to use MAC address. I know about the roaming devices thing, and that explains a lot of the events I see in the log, but others are from an AP port to a trunk port and back, or just trunk port to local port to trunk port, which I guess could be connecting a laptop to a hardline?

EDIT: I went ahead and swapped MS uplink sampling to exclude uplink interfaces, the B and C switches still see all devices but now they don't see their OWN devices

[cmr]

Are they all Meraki switches, or a mix of vendors?

[TMaki]

All Meraki, MS series