Extreme Networks Summit48si sets the new standard for Layer 3 switching at the edge by maximizing 10/100 port density, architecting unparalleled levels of reliability while maintaining leadership in Layer 3 software features and performance. The Summit48si's unsurpassed software features, capacity, and performance enable customers to provide more Layer 3 services to more users while using less space and at a lower cost than ever before.At an incredible one rack unit (1.75") in height, the Summit48si packs a whopping 48 10/100 Ethernet ports and 2 Gigabit Ethernet ports - with non-blocking capacity to support every port at full line rate. Included in this compact yet powerful package are two hot-swappable, load sharing power supplies - a reliability first in a 1 rack unit Layer 3 switch! And the Summit48si reliability is enhanced even further with dual Gigabit Ethernet uplinks, both of which are active and can be aggregated for enhanced throughput and increased redundancy. Extreme Networks' advanced Layer 3 software feature set, ExtremeWare, combined with the new 1 rack unit, dual power supply form factor makes the Summit48si an unbeatable solution at the edge of the network. Featuring the same Inferno ("i") series chipset that powers Extreme's award-winning Alpine and BlackDiamond modular switches, the Summit48si supports the most comprehensive set of Layer 3 switched services in the industry - including OSPF, prioritization and bandwidth management Quality of Service, Access Control Lists, Denial of Service protection, and many more features. This unique combination of high performance, reliability and extensive Layer 3 switched services enables the Summit48si to support redeployment of Layer 3 edge services right to the edge of the network - saving the customer money and improving overall network functionality and performance.