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Juniper Networks Expands Board of Directors with Appointment of Kenneth A. Goldman

SUNNYVALE, Calif., September 10, 2003 - Juniper Networks, Inc. (NASDAQ: JNPR) today announced the appointment of Kenneth A. Goldman, senior vice president, finance and administration and chief financial officer of Siebel Systems, Inc., (NASDAQ: SEBL) to the board of directors. "We're pleased to welcome Ken to the Juniper Networks board," commented Scott Kriens, chairman and chief executive officer, Juniper Networks. "Ken brings a wealth of experience in helping global, publicly traded companies steer a path to success. We're excited to welcome him to the Juniper Networks team."

"I'm honored to be joining the Juniper Networks board," said Ken Goldman, senior vice president, finance and administration and chief financial officer, Siebel Systems, Inc. "Juniper Networks has the focus and clarity of vision to transform the industry it serves. This vision, combined with Juniper Networks' proven track record in delivering on customer requirements and executing on the business fundamentals make it an exciting company in which to take part."

Mr. Goldman will be replacing C. Richard Kramlich, who has been a significant contributor to the board for more than 7 years, and will become chairman of the audit committee effective October 7, 2003. Mr. Goldman, 54, has served as Siebel Systems' senior vice president, finance and administration and chief financial officer since August 2000. Prior to joining Siebel Systems, he held CFO positions at Excite@Home, Sybase, Cypress Semiconductor, and VLSI Technology. An MBA graduate of the Harvard Business School with a degree in Electrical Engineering from Cornell University, he is a member of the Financial Accounting Standards Advisory Council (FASAC). Mr. Goldman also presently serves on the board of directors at LEGATO Systems, Inc.

About Juniper Networks, Inc.

Juniper Networks transforms the business of networking by converting a commodity - bandwidth - into a dependable, secure, and highly valuable corporate asset. Founded in 1996 to meet the stringent demands of service providers, Juniper Networks is now relied upon by the world's leading network operators, government agencies, research and education institutions, and information-intensive enterprises as the foundation for uncompromising networks. Juniper Networks is headquartered in Sunnyvale, California. Additional information can be found at www.juniper.net.

Juniper Networks is registered in the U.S. Patent and Trademark Office and in other countries as a trademark of Juniper Networks, Inc. ERX, ESP, E-series, Internet Processor, J-Protect, JUNOS, JUNOScript, JUNOSe, M5, M10, M20, M40, M40e, M160, M-series, NMC-RX, SDX, T320, T640, and T-series are trademarks of Juniper Networks, Inc. All other trademarks, service marks, registered trademarks, or registered service marks are the property of their respective owners.