When setting up Aruba Mesh with instants do not forget to turn off extended SSID.
- Create cluster with IAP let them sync with image and configuration (update them to lateist code)
- Disable the extended SSID ( in the latest version 4.x, it is enabled) in options
- you will find both the IAPs as mesh portals.
- Remove the IAP from the Switch which you want to make mesh point and provide external power.
- After booting, there will be a mesh link between two IAPs.