Switch Discovery Tool doesnt find Netgear gs324tp

Thanks for the response. With wifi off on my Macbook, and plugging an ethernet cable into the switch and into my Macbook I get an IP address for the Macbook, yes, and am able to browse the internet. The switch discovery tool still doesnt work though to provide me with the switch IP address! Traceroute doesnt show the switch either, just the IP address of the MX75 router - so the switch IP address is still not configurable and i need to set up LAG on some of the ports for the WAP's that have link aggregation capability.

For anybody in the UK, I got my leased line from BTNet only to discover that you get read-only access to the Meraki router AND wireless access point and can't do ANY config yourself, you have to go through their helpdesk to do anything at all, even assigning IP ranges on your LAN, assigning fixed IP addresses to any devices etc. And right now my other issue is that they havent yet provided me with details of how I can get even the read only access so i can SEE the LAN which is causing me this issue and putting me on here trying to find a solution for discovering the switch IP address without being able to see it from the router admin pages.