Press Release

Redback Networks Schedules Web Cast and Conference Call 

SAN JOSE, Calif., April 5, 2004 — Redback Networks Inc. (NASDAQ: RBAK), will announce financial results of its first quarter of 2004 on April 14, 2004. In a conference call and live web cast, executive management will discuss the first quarter results as well as business conditions.

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

Date: Wednesday, April 14, 2004 Time: 1:45 p.m. PT/2:45 MT/3:45 CT/4:45 ET Dial-in phone number: 1-847-619-6820 (domestic and international) 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 April 28, 2004. Dial-in: 1-630-652-3018 Passcode: 8732390

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.