Energy Sciences network (ESnet) to communicate and collaborate on the LHC projects, as well as many other scientific challenges funded by the Department of Energy (DOE). Their challenges are to overcome inherent difficulties of transmitting high-volume, bulk data transfers and offer guaranteed bandwidth service and traffic engineering across multiple domains to support analysis of LHC data flows. They chose Juniper Networks to overcome these challenge. They have implemented Juniper Networks MX960 and MX480 Ethernet services routers and EX4200 line of Ethernet switches. The results of implementing Juniper Networks were provide reliable, high-speed connectivity between U.S. universities labs and international research institutions required to support the inherently collaborative, global nature of modern, large-scale science and Upgraded network infrastructure from OC192 to 10 Gbps Ethernet.