The method determines whether a particular virtual adapter of a virtual network IHS may perform enhanced packet communication transfer of larger sizes than those of physical network IHSs. The method registers each virtual adapter maximum receive unit (MRU) value in an MRU attribute table within a hypervisor virtual switch. The hypervisor virtual switch provides communication pathways for packet transfers between virtual network IHS virtual adapters and also between physical adapters. The method determines if a sending virtual adapter is sending a packet to a receiving virtual adapter that is local or a remote virtual trunk adapter. The method determines if the receiving virtual adapter exhibits a registered MRU value. If the receiving virtual adapter exhibits a registered MRU value, the method provides for larger sizes of packet transfers for those particular packets.