IGMP snooping on a stack

Hello,

I have 2 N4032F in a stack.

The switches are for a VSAN cluster.

I want to enable IGMP snooping so I can use them for a 2nd VSAN cluster (in a different VLAN).

At the moment I have not set up any VLANs so the current cluster uses the native VLAN 1.

What are the proper steps that I have to do in order to enable IGMP with the minimum downtime?

Thanks