Hello vSohill,
"Is there a prefromance degregration between vSAN multicast or Unicast ?"
No. The functions of these is only for cluster membership and inventory communication not the transfer or syncing of functional data, so there should be no difference in performance when using
"In which case vSAN mulitcast should be used ?"
On clusters with any members still on a version prior to 6.6.
Bob
