First of all: I wish you the best of luck! Hunting unmanaged switches is very difficult in any kind of network. And unless you can see every outlet, cable and every cm (or inch if you're US) you always have the risk of missing one due to the fact that some devices might not be on at the moment of your hunt. You can however start with using what you know. Step 1: Start by using dashboard and identify each port on each switch that normally should have multiple MAC addresses on them such as connected Access Points, Firewalls, Routers, Server hosts and links to other known switches in the network. Step 2: Use the default gateway device of each VLAN in your network and ping the broadcast address of each network. Or if you don't have many VLAN's perhaps run an IP scanner on your network (or NMAP) to ping scan all networks so every host answers and each switch now has most MAC addresses in their table before timing them out in 5 minutes if the hosts become inactive again. Step 3: go to the tools page of your Meraki switches and run the mac address table of each and copy the results to some notepad pages. Step 4: from each notepad document remove all mac addresses seen on ports you identified in Step 1. Step 5: check for ports that have multiple mac addresses on them and note them for further reference. Once you're done you can break out your fluke, go to the switch closets note the patchpanel letters and numbers and check each link using your fluke. Hopefully the patches are labelled correctly and you have a floorplan that has the correct patch locations on them. If not that's an entire other work that needs to be budgetted and done.
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