какая версия стоит vsphere?
VMware ESXi 5.5 Update 1 Release Notes
пофиксили с сетью многое
VMXNET3 adapter resets in Windows Server 2008 R2 due to frequent changes in RSS
When Receive Side Scaling is enabled on a multi vCPU Windows virtual machine, you see NetPort messages for repeating MAC addresses indicating that ports are being disabled and then re-enabled.
ESXi 5.x host with virtual machines using an E1000 or E1000e virtual adapter fails with a purple diagnostic screen
ESXi host experiences a purple diagnostic screen with errors for E1000PollRxRing and E1000DevRx when the rxRing buffer fills up and the max Rx ring is set to more than 2. The next Rx packet received that is handled by the second ring is NULL, causing a processing error
Intel e1000e network interface driver might stop responding on received (RX) traffic
Intel e1000e network interface driver might stop responding on received (RX) traffic.This issue is resolved in this release.