What virtual network adapter are your VMs configured with?
I've seen weird issues with E1000 adapters. I'd recommend changing them to VMXNET 3 if they aren't already.
VMware Tools or VMware View Agent "if aplicable" are out of date?
Reinstalling the vmware tools/ resolved the issue most of the time (because this reinstalls the drivers)
-- Connect to VM or Template from vCenter Console
-- Uninstall VMware View Agent
-- Uninstall VMware Tools
-- Reboot
-- Delete if you find them
-- Delete HKEY_LOCAL_MACHINE\SOFTWARE\VMware, Inc.\VMware Tools
-- Delete HKEY_LOCAL_MACHINE\SOFTWARE\VMware, Inc.\VMware VDM
-- Delete C:\Program Files\VMware\VMware View\*.*
-- Delete C:\Program Files\VMware\VMware Tools\*.*
-- Delete C:\Documents an Settings\All Users\Application Data\VMware\VDM\*.*
-- Reboot VM
-- Install VMware Tools (Complete)
-- Reboot
-- Install VMware View Agent (Latest release)
-- Reboot
Check system configuration and TCP/IP settings:
-- Make sure subnet mask is correct.
-- Make sure DNS servers exists.
-- Make sure default gateway is correct.
-- Check DHCP server for duplicate IPs.
Raul.
VMware VDI Administrator.
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