Our host environment is ESX 4.0 and ESX5i. All network cards are configured 1 GB. Guests are a mix of 32 or 64 bit W2K3, W2K8 and RHEL.
Most guests are using the e1000 driver although we have some using vmxnet3. We sometimes have an unexplained drop in the communication
between one of our app servers and it's database server. Other times our monitoring software sends an alert for lost connection to different VMs.
When we check the servers we do not find any failed NICS or related events. One of our software vendor suggested we change the adapter type
from e1000 to vmxnet3 . Can anyone offer some advice on this? We have about 5oo VMs most are e1000 and seem to be working OK. Thx.