# Perspective (Main Gateway and Failover)

**URL:** <https://forum.inductiveautomation.com/t/perspective-main-gateway-and-failover/87750>\
**Category:** Ignition\
**Tags:** perspective\
**Created:** [March 22, 2024, 3:18pm UTC](https://forum.inductiveautomation.com/t/perspective-main-gateway-and-failover/87750 "2024-03-22T15:18:02Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jardel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/jardel/32/27369_2.png) [@jardel](https://forum.inductiveautomation.com/u/jardel)\
**Post date:** [March 22, 2024, 3:18pm UTC](https://forum.inductiveautomation.com/t/perspective-main-gateway-and-failover/87750/1 "2024-03-22T15:18:02Z")

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Next month we will implement a project that requires a Perspective license.

A question about licensing.

When purchasing a license for the Main Gateway, is it necessary to purchase a license for Failover?

We have a license for this Main + Failover scenario, we just need to add Perspective to the scenario.

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [March 22, 2024, 3:41pm UTC](https://forum.inductiveautomation.com/t/perspective-main-gateway-and-failover/87750/2 "2024-03-22T15:41:51Z")

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Yes, modules must exist in both gateways, and must be licensed in both master and backup gateways. Like any other module, IA charges 50% of the master module price for backup modules.