Press Release

Redback Sets New Industry Standard For Reliability With Uninterruptible Broadband Sessions New Session Level Reliability Ensures High Reliability for Voice, Video and Online Multi-Player Games

SAN JOSE, Calif., May 3, 2004 – Redback Networks Inc. (NASDAQ: RBAK), a leading provider of next-generation broadband networking systems, today announced the availability of Session Level Reliability, a new technology designed to provide uninterrupted broadband Internet sessions for voice, video, online multi-player games and other applications. The capability advances the company’s five-nines reliability platform, giving carriers and service providers the ability to offer stronger service-level guarantees to customers with important mission-critical, streaming applications running over broadband.

Session Level Reliability is an industry first and sets a new standard, providing a platform for delivering premium, value-added services that can help differentiate service providers in an increasingly competitive market. Session level reliability is built into the latest release of the operating system for Redback’s SmartEdge® Service Gateway and is designed to ensure that ongoing individual broadband subscriber sessions will not be dropped or interrupted in the event of a hardware failure. The system is designed so that if an error is encountered, sessions are seamlessly transferred to a redundant route processor without interrupting the session. Session Level Reliability builds on the already highly reliable modularized architecture of Redback platforms, increasing assurance of session stability.

"Reliability is increasingly important as providers expand broadband services beyond best-effort access," said Mark Bieberich, program manager, The Yankee Group. "Improvements in reliability translate to high levels of customer satisfaction, and enable providers to offer the requisite service level guarantees for Voice-over-IP, multi-player games, video conferencing, and other streaming or latency-sensitive applications."

"A new standard for Internet session reliability is crucial as the Internet evolves from a system of simple, best effort connectivity to one of premium services and continuous delivery," said Shailesh Shukla, vice president of marketing and business development for Redback Networks. "Redback offers an innovative technology platform that enables us to introduce unique solutions well in advance of our industry peers. Session Level Reliability is yet another Redback technology that offers strategic and competitive advantages to carriers and service providers."

About Redback Networks

Redback Networks Inc., a leading provider of next-generation broadband networking equipment, enables carriers and service providers to build third-generation broadband networks that can profitably deliver simplified, personalized, portable subscriber services to consumers and businesses. The company's carrier-class, consumer-scale SmartEdge Router and Service Gateway platforms for Consumer IP subscriber management systems and edge routing in conjunction with the NetOp™ element and policy Management platform provide a powerful, flexible infrastructure for managing both subscribers and value-added services.

Founded in 1996 and headquartered in San Jose, Calif., with sales and technical support centers located worldwide, Redback Networks maintains a growing and global customer base of more than 500 carriers and service providers, including major local exchange carriers (LECs), inter-exchange carriers (IXCs), PTTs and service providers.

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REDBACK and SmartEdge are trademarks registered at the U.S. Patent and Trademark Office and in other countries. NetOp is a trademark of Redback Networks Inc. All other products or services mentioned are the trademark, service marks, registered trademarks or registered service marks of their respective owners.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995

The statements contained in this press release that are not purely historical are forward-looking statements within the meaning of Section 21E of the Securities and Exchange Act of 1934, as amended, including statements regarding Redback Network’s expectations, beliefs, intentions or strategies regarding the future and including, without limitation, statements regarding Session Level Reliability as a new standard, its effect on differentiating service providers, and its ability to ensure uninterrupted service or to enable service providers to offer the requisite service level guarantees for voice, video, online games and other applications. All forward-looking statements included in this document are based upon information available to Redback Networks as of the date hereof, and Redback Networks assumes no obligation to update any such forward-looking statements. Forward-looking statements involve risks and uncertainties, which could cause actual results to differ materially from those projected. These risks and other risks relating to Redback Network’s business are set forth in the documents filed by Redback Networks with the Securities and Exchange Commission, specifically the most recent report on Form 10-K and the other reports filed from time to time with the Securities and Exchange Commission.