Hello,
First off, let's try to agree in some terminology here. Any IP address is usable. And no one here is able to say if the IP is wrong or not without see your Ip address mapping or checking your devices.
What you are calling "Usable IP address", I am assuming you want to say Public IP address:
"A public IP address is an IPv4 address that is reachable from the internet. If a resource in your tenancy needs to be directly reachable from the internet, it must have a public IP address."
There's no such thing as "Lan IPs". Any IP can be used in the LAN or WAN, it all depends how the topology is built. I am assuming that when you say LAN IPs you want to say Private IP address:
- 192.168.0.0 – 192.168.255.255 (65,536 IP addresses)
- 172.16.0.0 – 172.31.255.255 (1,048,576 IP addresses)
- 10.0.0.0 – 10.255.255.255 (16,777,216 IP addresses)
https://www.rfc-editor.org/rfc/rfc1918
If your Meraki solution need to be reached from the Internet directly, you need Public IP address. If the Meraki solution needs to be reached from your local network, you dont need public IP address and you can use Private IP address.
