Myricom and Extreme Networks Target High Performance Computing and Data Centers with Proven 10-Gigabit Solutions.

ARCADIA, Calif. -- Myricom, Inc. and Extreme Networks, Inc. (Nasdaq:EXTR), the leader in open converged networks, are teaming up to help customers with High-Performance Computing (HPC) and mainstream networking applications with jointly tested network solutions that achieve 10-Gigabit performance.

The two companies will demonstrate interoperability in booth #436 at the SC|05 event being held in Seattle this week. Upon entering an agreement where Myricom has joined Extreme Networks'(R) Go Purple Partner Program, the companies conducted a comprehensive series of tests combining high-availability switches from Extreme Networks with Myricom's Myri-10G Network Interface Cards (NICs) and achieved wire-speed performance at 10-Gigabit speeds.

"Demonstrating the performance results of our combined solution provides customers with information to confidently select Extreme Networks and Myricom," said Tim Nolan, Extreme Networks' vice president of business development. "Now users can obtain the high availability and performance of our network switches for High Performance Computing clusters."

Wire-speed Performance at 10-Gigabit Speeds

Joint testing encompassed multiple product sets including the latest 10-Gigabit solutions from both companies. Extreme's modular BlackDiamond(R)8800 switch series features the low latency and high densities demanded in high-end-enterprise and HPC applications, while Myricom's newly available Myri-10G solutions extend the price and performance advantages of Myrinet interconnect technology to 10-Gigabit speeds and, for the first time, to native Ethernet.

Tests featuring Extreme Networks' BlackDiamond(R) 8810 modular switch running with the newly available Myri-10G NICs commenced with demonstrating interoperability using both 10GBase-SR and 10GBase-CX4 links. In performance tests of the switch, traffic throughput exactly matched theoretical 10-Gigabit line rates for standard 1500-Byte Ethernet frames and 9-KByte jumbo frames. The same wire-rate results were seen in unidirectional tests, bidirectional send/receive tests, and multiple-port patterns, showing that the BlackDiamond 8810 switch is truly a wire-rate switch. For these tests of switch throughput, the NIC firmware was operating in a "raw" Ethernet mode in which the data bypasses the host's IP protocol stack. Additional performance tests of the Myri-10G 8-lane PCI-Express NICs were performed between dual-Opteron servers running Red Hat Enterprise Server 4.0, kernel 2.6.9-22.0.1.ELsmp. With the standard Myricom driver and firmware, the netperf benchmark showed TCP/IP data rates in a range from 9.6 to 9.8 Gigabits/s, and UDP/IP data rates in excess of 9.9 Gigabits/s.

"We've found Extreme Networks' switches very easy to configure, and their wire-rate performance is well suited to the rigorous requirements of High Performance Computing," says Dr. Chuck Seitz, founder and CEO of Myricom. "Working together and certifying the performance of joint high-speed solutions positions the companies well as the needs of traditional HPC users and mainstream data centers converge."

As part of their joint efforts, Myricom and Extreme Networks have launched programs to train their respective sales and marketing teams on each vendor's products.

Extreme Networks, Inc.

Extreme Networks is a leader in open converged networks. Its innovative network architecture provides enterprises and metro service providers with the network resiliency, adaptability and simplicity required for a true a converged network that can support voice, video and data, over a wired and wireless infrastructure, while delivering high-performance and integrated security features. For more information, please visit www.extremenetworks.com .

About Myricom (www.myri.com)

Founded in 1994, Myricom, Inc. created Myrinet, the high-performance computing (HPC) interconnect technology used in thousands of computing clusters in more than 50 countries worldwide. With its next-generation Myri-10G solutions, Myricom is bridging the gap between the rigorous demands of traditional HPC applications and the growing need for affordable computing speed in mainstream enterprises. Privately held, Myricom achieved and has sustained profitability since 1995 with forty-two consecutive profitable quarters through September 2005. Based in Arcadia, California, Myricom solutions are sold direct and through channels. Myrinet clusters are supplied by OEM computer companies including IBM, HP, Dell, and Sun, and by other leading cluster integrators worldwide.

Except for the historical information contained herein, the matters set forth in this press release, including without limitation statements as to performance and functionality of the combined solution and the Extreme Networks products are forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements speak only as of the date. Because such statements deal with future events, they are subject to risks and uncertainties, including network design, actual product performance, and use of the products in different environments and configurations. We undertake no obligation to update the forward-looking information in this release. Other important factors which could cause actual results to differ materially are contained in the Company's 10-Qs and 10-Ks which are on file with the Securities and Exchange Commission (http://www.sec.gov).

All product and company names herein may be trademarks of their registered owners.