Optimize THE PVE multicast cluster communication

Hi to all

Can somebody help me with these doubts?

I don't know how do a optimization of the PVE cluster communication in multicast mode.

Ie, if i have in my LAN several PVE Nodes in Cluster and very many workstations, and i want that the communication in multicast of the PVE nodes only reach to the others PVE nodes and no others destinations.

The question is: ¿how i get this?

- Also, i don't know if for get this target, is possible use unmanaged switches?
- But, always i want that any workstation can connect to any PVE node for administer it.
- If all these conditions aren't possible, what is the way more nearest for get it?

Notes:
- Networking isn't my forte
- Please, be patient and explain me in easy terms.
- If the configurations are different with managed and unmanaged switches, please explain me in each case.

Best regards
Cesar