Press Release

Redback Networks to Present at SG Cowen 33rd Annual Technology Conference 2005 

SAN JOSE, Calif., May 27, 2005 – Redback Networks Inc. (NASDAQ: RBAK), a leading provider of next-generation broadband networking systems, today announced that Thomas L. Cronan III, senior vice president of finance and administration and chief financial officer, will be presenting at the SG Cowen 33rd Annual Technology Conference in NYC on Wednesday - 6/1 - 2005 at 5:00 PM EST. A live audio-only webcast and replay of the presentation will be available at: http://www.redback.com/sgcowen-presentation. For proper results, listeners must disable any pop-up blockers to access the webcast.

About Redback Networks
Redback Networks Inc., a leading provider of next-generation broadband networking equipment, enables carriers and service providers to build Smart Broadband Networks that can 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 combine subscriber management systems and edge routing and, in conjunction with the NetOp™ Element and Policy Manager 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. For more information, visit Redback Networks at www.redback.com.