Upgrade from 7.0 to PI7.4

Hi Experts,

We are planning to upgrade your SAP XI 7.0 dual stack system to PI 7.4 Dual stack.

Our Basis team is planning to migrate OS from AIX to Linux. Is there will be any issue at PI side if we migrate to new OS?, What all the precautions/measure we need to take..?, Cant we move our all interfaces at a time to the new OS?.

Please suggest the flow to follow at the time of upgrade at PI side, What all the things we need to take care at PI side.

Really appreciate your inputs and thank a lot for your support and time.

Regards

G V Anil