Attached is a job aid that outlines the various configurations that a user could configure with LAN communications and Agilent instruments. It also has the below statement that backs our single NIC policy.
Agilent recommends, sells, and supports only the use of single network adapter (NIC) Single Quad GC/MS system with switch network configuration. Within Agilent, virtually all product development, hardware and software test uses a single network adapter because this is the most cost effective solution and has no known network configuration problems. The network switch supplied with Agilent GC/MS bundles prevents the instrument-to-PC network traffic from entering the house LAN and prevents unnecessary house LAN traffic from interfering with the instrument-to-PC traffic.