Right Media considered rival offerings from Cisco, Nortel Networks Ltd.s Alteon division and NetScaler Inc., but Cisco was "too expensive and complicated," Philips said. NetScaler was too expensive and focused more on Layer 7 switching, and Alteon didnt offer similar performance, he said. Content-aware, layers 4 to 7 switches handle link and network information as well as application-level data, including user and device information.An increasing number of service providers and enterprise users are turning to layers 4 to 7 switching to facilitate virtual server farms and to improve their capacity to handle dynamic and streaming content. The switches also enable the running of e-business applications that require tight control of traffic priority and the security of a VPN. The E Series line provides hot-swappable and redundant power supplies, hot-swappable modules, and expandable capacity. The ServerIronGT EGx2 two-port Gigabit model can support 50,000 Layer 4 connections per second and can withstand 700,000 Syn attacks per second. The ServerIronGT EGx4 can support 100,000 Layer 4 connections per second and handle 1.5 million Syn attacks per second. The ServerIronGT E10x2 supports 150,000 Layer 4 connections per second and can withstand 2.3 million Syn attacks per second. Each switch has two available slots for expansion, redundant management or direct-attached servers. In addition, each can be deployed with or without existing core Layer 2 switches and routers. The E Series application switches are due by the middle of next month, and they start at $15,995. Check out eWEEK.coms Infrastructure Center at http://infrastructure.eweek.com for the latest news, views and analysis on servers, switches and networking protocols for the enterprise and small businesses.
The additional information allows users to employ sophisticated policies to manage traffic and bandwidth and perform finely tuned load balancing, quality-of-service measurements and data access control.