Chelsio Delivers 10GbE Unified Wire Fully Integrated With Citrix XenServer 4.1

'In-Box' Drivers Enable Industry's Highest I/O Performance For Leading Server Virtualization Platform

SUNNYVALE, Calif., April 28 /PRNewswire/ -- Chelsio Communications, Inc., the leading provider of 10-Gigabit Ethernet (10GbE) adapters and ASIC solutions, today announced new software drivers that are fully integrated within the newly released XenServer 4.1 from Citrix Systems Inc. (NASDAQ: CTXS). The 'in-box' drivers provide seamless deployment of Chelsio 10GbE Unified Wire adapters with Citrix XenServer 4.1, enabling the industry's best I/O performance for single or multiple Windows and Linux virtual machines (VM) while delivering on the promise of the unified wire.

The Chelsio adapters are based on Chelsio's 3rd generation T3 ASIC, which delivers the highest bandwidth and lowest latency in the industry. The drivers for XenServer 4.1 have gone through a rigorous qualification process by both Citrix and Chelsio for the Citrix release of XenServer 4.1, which insures seamless installation. Chelsio is an official Citrix Ready partner.

"Chelsio's integrated 10GbE drivers for XenServer 4.1 are very easy to use, and can substantially boost the network performance of virtualized environments," said Jason Timmins, technical director at InterLinx, Ltd, a UK-based internet service provider. "We can now run even more network- intensive workloads on each virtual machine without sacrificing application performance."

Citrix XenServer 4.1 permits enhanced scalability, faster performance, and the ability to conduct virtual infrastructure platform upgrades and automated patching with zero downtime. The 4.1 release also includes many other new capabilities, including support for 10Gb/s networking, bonding, and 64-bit enterprise Linux guests. As part of the qualification process, Chelsio is included in the Citrix hardware compatibility list.

"Chelsio's 10GbE drivers for XenServer 4.1 deliver line-rate performance, which greatly boosts the value of XenServer 4.1 for the range of high- throughput applications," said Matt Fairbanks, vice president of product marketing for XenServer at Citrix. "Our customers can now run their most network-intensive workloads on their virtual servers and achieve the best overall performance in the industry."

"Virtualization support is a key attribute of our T3 unified wire technology, and we are pleased to be the only vendor in the industry that has delivered full 10G line-rate I/O performance for virtualized server environments using a single VM," said Kianoosh Naghshineh, president and CEO of Chelsio. "Citrix's customers enjoy the cost benefits and richness of XenServer 4.1 virtualization while maintaining the performance and cost advantages of Chelsio's unified wire solutions."

The adapters for Citrix XenServer 4.1 are available today from Chelsio and its distribution partners. Chelsio will be demonstrating its virtualization solutions, including iSCSI and TOE capabilities for XenServer, at Interop Las Vegas '08, April 29-May 1, at Mandalay Bay Hotel in Las Vegas.

About Chelsio Communications Inc.

Chelsio Communications is leading the convergence of networking, storage and clustering interconnects with its robust, high-performance and proven unified wire technology. Featuring a highly scalable and programmable architecture, Chelsio is shipping 10-Gigabit Ethernet and multi-port Gigabit Ethernet adapter cards, delivering the low latency and superior throughput required for high-performance computing applications. For more information, visit the company online at

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