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HP FlexNetwork Architecture
HP FlexNetwork Architecture is a network architecture developed by Hewlett-Packard to provide networking services and a consistent network architecture for the data center, campus and branch offices. It was developed to support technologies such as virtualization and cloud computing.〔(HP Challenges Cisco with New FlexNetwork Architecture )〕 HP FlexNetwork Architecture encompasses four products: HP FlexFabric, used to improve performance and latency in virtualized server environments; HP FlexCampus, used to connect wired and wireless networks in environments that support mobile and rich media applications; HP FlexBranch, used to improve network service delivery in branch offices; and HP FlexManagement, a single-pane-of-glass management platform that spans all of the FlexNetwork Architecture.〔(HP Unveiled its FlexNetwork Architecture )〕
==Network architectures==
Traditional network architectures employ a three-tier model. This hierarchical model builds in redundancy at the core and aggregation layers.〔Prickett Morgan, Timothy. "No more tiers for flatter networks," The Register, September 21, 2011 ()〕 This model uses the Spanning Tree Protocol, which determines one path of transport on the network from one point to another. All other paths are closed off.〔"Interop New York: Networks and the end of spanning tree," SearchNetworking. ()〕 This model is best suited for users inside the firewall accessing applications where network utilization of those applications is generally low. Server utilization is also generally low. This model best serves applications that have permanent homes on physical servers.〔Prickett Morgan, Timothy. "No more tiers for flatter networks," The Register, September 21, 2011 ()〕 The problems of a three-tier model include network redundancy, lag and data loss.〔Samson, Ted. "Juniper bets big on a flat network," InfoWorld, February 23, 2011. ()〕 This model is also inefficient for virtualized environments that require multiple non-blocked connections between servers.〔"Interop New York: Networks and the end of spanning tree," SearchNetworking. ()〕
Industry analyst firm Gartner predicts that by 2014, 80 percent of traffic in the data center's local area network (LAN) will be between servers. Gartner also predicts that by the end of 2012, virtualized applications will account for half of all enterprise applications in the data center.〔Jones, Penny. "HP expands on FlexNetwork capabilities," DataCenterDynamics.com, October 6, 2011. ()〕
A flat network promotes lower latency, which enables scale and performance.〔Oltsik, Jon. "Data Center Network Confusion and Reality," Enterprise Strategy Group, July 19, 2011. ()〕 A flat network supports the use of such technologies as automation, convergence and virtualization. A flat network holds the promise of network performance improvements and simplified maintenance operations.〔Schultz, Beth. "Flat Networks are the Future," ChannelWorld, March 25, 2011 ()〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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