I can't speak to the intricaties of those internet connections in your area.  Usually in the IPv4 world you have public and private addressing.  So a router does the translating between your internal subnets and an external IP address.  Sometimes you have the ISP router itself that does the translation so you only get private IP addresses behind the ISP.  But you will have to talk to them how it is. However in other cases you get a public IP directly on your router/firewall and it does the NAT. A switch does not do NAT.  So I believe in your case the ISP is doing the NAT but once again check with your ISP and they private the subnet that lives between their router and your device and also route that second /28 space towards the IP you are supposed to set in your routing table. One important aspect with Meraki L3 switches is that you have those SVI's you want to install for your user traffic.  However your switch needs a separate management IP to actually talk to the Meraki cloud to receive it's config. So in your /29 range you should use another IP for your switch itself and also point to the same default gateway.  And then your switch should eventually reach the cloud.  (white led instead of orange) ... View more