I am running Windows 2008 32b/x64 guests on ESX 3.5u4.
Enhanced vmxnet NIC is an option.
What are the benefits (or potential issues) using one over the other?
Accoding to VMware Virtual Networking Concepts (http://communities.vmware.com/docs/DOC-8070)
>vmxnet — a paravirtualized device that works only if VMware Tools is installed in the guest operating system. A paravirtualized device is one designed with specific awareness that it is running in a virtualized environment. The vmxnet adapter is designed for high performance. In most cases, when you select the flexible network adapter, this is the adapter used after VMware Tools is installed in the guest operating system.
>vlance — a virtual device that provides strict emulation of the AMD Lance PCNet Ethernet adapter. It is compatible with most 32-bit guest operating systems. This adapter is used when you select the flexible network adapter but VMware Tools is not installed in the guest operating system.
>e1000 — a virtual device that provides strict emulation of the Intel E1000 Ethernet adapter. This is the virtual Ethernet adapter used in 64-bit virtual machines. It is also available in 32-bit virtual machines.
VMware vExpert '2009