Netgear FS524S Whitepaper - Page 2

The History of Stackables Historically, the stackable concept has been the preferred method of moving data between different nodes and devices on larger networks (more than 20 users). First introduced in network hubs, the stacking solution proved immediately successful for many reasons, particularly those of flexibility and price. With the advent of the network switch, the stackable concept became popular once again. Unlike hubs, which are designed to share the available bandwidth through port bandwidth degradation, a stackable switch provides full bandwidth to each of the ports on the switch. For example, a heavy-traffic hub with 16 10/100 ports might forward as little as 6.25 Mbps per port, while a full-duplex switch can move close to 200 Mbps of data on each port. What is a Stackable Switch? Stackable switches are single-configuration switches that can be stacked and interconnected through proprietary ports. The concept of stacking, however, is more than just physically placing one switch on top of another or connecting some switches using a proprietary connection. The essence of stacking starts with bandwidth. In a stacking arrangement, the connection between any two switches must provide future-proof bandwidth to prevent oversubscription as additional switches are added. For this reason, stackable switches that have a high-performance, high-availability uplink port can create a fat-pipe connection between cascaded switches that boosts the backbone bandwidth, eliminating backbone bottlenecks and network-looping issues. A stackable solution should also free users from the yoke of having to choose between performance and price. Unlike chassis-based solutions, which require a significant initial investment of the physical chassis, truly stackable solutions should allow users to buy only the number of ports required at the time of purchase, with the ability to upgrade to additional ports at a later date. (This advantage was one of the key reasons contributing to the popularity of stackable network hubs.) Additional benefits derived from a scalable stacking technology include: • Seamless migration from 10 Mbps to 100 Mbps to 1000 Mbps (1 Gbps). • Easy expansion to match an organization's future networking requirements. For example, you can readily expand network size (number of nodes), and performance (bandwidth) in incremental steps, maintaining interoperability throughout. • The flexibility to redeploy network resources if and when the need arises. Scalable stacking technology also makes it easy to add switches to support more users, thereby providing greater bandwidth and protecting against network downtime. In this way, small office can respond to business changes while obtaining peak performance from existing infrastructure. The Challenges of Network Growth In assessing your own need for scalable solutions, consider the potential impact of the following industry-wide trends on your network. 2