Dropped packets are not reported in the System Health card in the Appliance Management dashboard. You can get information about them from the virtual application instead.
Log on to the VMware ESXi or VMware ESX host, or the vCenter Server using the vSphere Client.
Select the VMware ESXi or ESX host in the inventory list.
Select the virtual appliance and click the Performance tab.
Click Advanced → Chart Options.
Select Network → Real-time.
Enable the Transmit packets dropped and Receive packets dropped counters and click Apply.