Press Release

Redback Networks Schedules Web Cast and Conference Call

SAN JOSE, Calif., July 6, 2004 — Redback Networks Inc. (NASDAQ: RBAK), will announce financial results of its second quarter of 2004 on July 21, 2004. In a conference call and live audio web cast, executive management will discuss the second quarter results as well as business conditions.

The details of the call and web cast are as follows:

Date: Wednesday, July 21, 2004 Time: 1:45 p.m. PT / 2:45 p.m. MT / 3:45 p.m. CT / 4:45 p.m. ET Dial-in phone number: 1 (847) 619-6368 Web cast: You can also participate in the conference call via your computer by registering your name on Redback's Investor Center at: http://www.redback.com

Telephone Replay available one hour after conclusion of call through July 28, 2004. Dial-in: 1 (630) 652-3018 Passcode: 9386106

To ensure that the conference begins in a timely manner, please dial in 10 minutes prior to the scheduled start time.

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REDBACK is registered at the U.S. Patent and Trademark Office and in other countries