Did you get any resolution with this issue? We’re experiencing similar symptoms/ same period between dropouts, although I have an entirely different setup (60 users). I have BTNet 100mpbs supplied to the Meraki as wires only, then into a Draytek 3910 for our GW/DHCP.
Connection drops once a week, maybe 2 weeks, but on the Draytek the WAN shows as still live. It will recovery by itself after a few minutes. But we’re using BT cloud voice, so users lose their calls for a few minutes.
I’m still suspicious of the Meraki. We had an issue with it a few months back, where randomly one morning we could not get any internet access out from the Draytek at all, but BT could see the Draytek inbound, so stated the connection was fine. At a loss I changed to another port on the Meraki and it resolved it! BT refused to replace Meraki as it was now functioning.
I’m pretty certain it’s nothing inside the network, everything on the LAN side still works fine (Database/CRM, file servers etc). BT state no errors on the Meraki/line, but state that we are regularly using all of the bandwidth. I do see 95Mpbs usage reported on the Draytek at various times throughout the day. Is that a likely cause for connection instability/dropping temporarily. I can upgrade the bandwidth, but reluctant too spend if that's not the problem.
What doesn’t sit with me is the period of time between the drops, why only once a week or two.