This document summarizes testing of 100 gigabit Ethernet (100GE) technology in a lab setting. It describes initial successful testing of 100GE using multiprotocol label switching (MPLS) but notes challenges with limited tester availability, existing fabric capacity, and interoperability costs compared to 10 gigabit or 40 gigabit Ethernet. It raises questions about the future adoption of 100GE over other high-speed Ethernet options.