Hub and spoke architecture license details

I am choosing HUB and spoke architecture for my customer need, So i have central server, and 2 to 3 spoke ignition server running, I have few question regarding licenses and pricing,

Also , I purchasing following module :

Ignition Platform
Vision Module
SQL Bridge Module
Tag Historian Module
Reporting Module
Alarm Notification Module
OPC UA Module
Webdev Module

I have few question regarding licenses and pricing,

1.All purchased module can be used in all HUB and SPOKE server in my network architecture, like it is only one time purchase so we can use for n number of servers?
2. If no, shall i need to purchase separately for all the single server I am using in HUB and SPOKE architecture.

Kindly give your inputs!

You have to license every gateway instance you create.

Thanks for your reply. What about other modules, Should I have to buy all modules for every gateway I am using? Else module can be purchased once, been use in multiply server?
I hope Ignition server license and other module license is different !

No. Only EAM has a central license for clients. Everything else is paid license per module per gateway.

You generally do not need all the modules in all of the gateways.

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To followup on what @pturmel said, you would be best sitting down with a sales engineer to go over your requirements and they can help you configure things out properly.

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