thanks for the reply André
>Do you see any entries in the guest's event logs regarding this issue? What type of physical switch do you use? In case of a managed switch how did you configure the ports (e.g. port security, spanning-tree, ...)?
the virtual switches have the same configuration i dont see any difference here.
Only that VM's on ESX1 are not able to acquire ip's from DHCP server.
>guest's event logs regarding this issue
should i be seeing vmware.log of this particular VM?