The Enhanced Gigabit Ethernet Interface Processor (GEIP+), part of the new generation of interfaces based on VIP4 technology, provides a complete, high performance, single-slot solution for Gigabit Ethernet connectivity in Cisco 7500 series routers.The GEIP+ is appropriate for campus, enterprise edge and WAN aggregation applications. When used on the campus, the Cisco 7500 series router with the GEIP+ connects the enterprise WAN and legacy LANs, such as FDDI or Token Ring, to the Gigabit Ethernet campus backbone. At the enterprise edge, the Cisco 7500 with GEIP+ provides high performance WAN to campus backbone connectivity. When the Cisco 7500 series router is used for WAN aggregation, the GEIP+ provides intra-pop connectivity between the Cisco 7500 series router and high-speed WAN core devices, such as the Cisco 12000 series router.