It does not sound like you have a device configured to route between these VLANs. All you have laid out is layer 2 switching, but have not talked about what (if anything is setup to do routing). You would have to have a single device connected to all VLANs (either an MX or switch with L3 routing turned on). You cannot forward traffic between VLANs without a routing device connected to all VLANs That routing device would have an IP address in each VLAN, which would use as a default gateway on that VLAN. Also as @PhilipDAth says, all of those VLANs would have to be defined in each switch. This is because the non-Meraki switches are not learning the VLAN from the Meraki network. Is there a reason you have to cascade the switches, rather than have both Switch 2 and 3 connect directly to Switch 1? What model is Switch 1? Is it Layer 3 capable, or do you have an MX?
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