content: <PAGE>
  
                                    UNITED STATES
                         SECURITIES AND EXCHANGE COMMISSION
                                Washington, DC 20549
  
  
                                      FORM 8-K
  
  
                               Current Report Pursuant
                            to Section 13 or 15(d) of the
                           Securities Exchange Act of 1934
  
  
                           Date of Report: April 10, 2002
  
  
                                REDBACK NETWORKS INC.
            -------------------------------------------------------------
               (Exact Name of Registrant as Specified in its Charter)
  
  
             Delaware                   000-25853                 77-0438443
  ----------------------------   ------------------------   ----------------------
  (State or Other Jurisdiction   (Commission File Number)      (I.R.S. Employer
       of Incorporation)                                    Identification Number)
  
  
                                   300 Holger Way
                                 San Jose, CA 95134
                                   (408) 750-5000
         ------------------------------------------------------------------
          (Addresses, including zip code, and telephone numbers, including
                     area code, of principal executive offices)
  
  <PAGE>
  
  ITEM 5.  OTHER EVENTS.
  
  On April 10, 2002, Redback Networks Inc., a Delaware corporation ("Redback"),
  announced its financial results for the fiscal first quarter of 2002. A portion
  of Redback's press release announcing these financial results is attached as
  Exhibit 99.1 hereto and incorporated by reference herein.
  
  
  The press release filed as an exhibit to this report includes "safe harbor"
  language pursuant to the Private Securities Litigation Reform Act of 1995, as
  amended, indicating that certain statements about the Company's business
  contained in the press release are "forward-looking" rather than "historic." The
  press release also states that these and other risks relating to Redback's
  business are set forth in the documents filed by Redback 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.
  
  ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.
  
       (c)  EXHIBITS.
  
            99.1 Press Release dated April 10, 2002
  
  <PAGE>
  
                                     SIGNATURES
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  Registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
  
                                       REDBACK NETWORKS INC.
  
  
  DATE:  April 11, 2002                By:   /s/ Dennis P. Wolf
                                           ------------------------------------
                                           Dennis P. Wolf
                                           Senior Vice President of Finance and
                                           Administration, Chief Financial Officer
metadata_documents: [{"type": "8-K", "sequence": "1", "filename": "d8k.txt", "description": "FORM 8-K FOR PERIOD ENDING 04/10/02", "secsgml_size_bytes": 3071}]
metadata_filer: {"company-data": {"conformed-name": "REDBACK NETWORKS INC", "cik": "0001081290", "assigned-sic": "7389", "irs-number": "770438443", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-25853", "film-number": "02608524"}, "business-address": {"street1": "250 HOLGER WAY", "city": "SAN JOSE", "state": "CA", "zip": "95134", "phone": "4085715000"}, "mail-address": {"street1": "1195 BORREGAS AVE", "city": "SUNNYVALE", "state": "CA", "zip": "94089"}}
text: UNITED STATES
                         SECURITIES AND EXCHANGE COMMISSION
                                Washington, DC 20549
  
                                      FORM 8-K
  
                               Current Report Pursuant
                            to Section 13 or 15(d) of the
                           Securities Exchange Act of 1934
  
                           Date of Report: April 10, 2002
  
                                REDBACK NETWORKS INC.
            -------------------------------------------------------------
               (Exact Name of Registrant as Specified in its Charter)
  
             Delaware                   000-25853                 77-0438443
  ----------------------------   ------------------------   ----------------------
  (State or Other Jurisdiction   (Commission File Number)      (I.R.S. Employer
       of Incorporation)                                    Identification Number)
  
                                   300 Holger Way
                                 San Jose, CA 95134
                                   (408) 750-5000
         ------------------------------------------------------------------
          (Addresses, including zip code, and telephone numbers, including
                     area code, of principal executive offices)
  ITEM 5.  OTHER EVENTS.
  
  On April 10, 2002, Redback Networks Inc., a Delaware corporation ("Redback"),
  announced its financial results for the fiscal first quarter of 2002. A portion
  of Redback's press release announcing these financial results is attached as
  Exhibit 99.1 hereto and incorporated by reference herein.
  
  The press release filed as an exhibit to this report includes "safe harbor"
  language pursuant to the Private Securities Litigation Reform Act of 1995, as
  amended, indicating that certain statements about the Company's business
  contained in the press release are "forward-looking" rather than "historic." The
  press release also states that these and other risks relating to Redback's
  business are set forth in the documents filed by Redback 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.
  
  ITEM 7.  FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.
  
       (c)  EXHIBITS.
  
            99.1 Press Release dated April 10, 2002
  SIGNATURES
  
       Pursuant to the requirements of the Securities Exchange Act of 1934, the
  Registrant has duly caused this report to be signed on its behalf by the
  undersigned hereunto duly authorized.
  
                                       REDBACK NETWORKS INC.
  
  DATE:  April 11, 2002                By:   /s/ Dennis P. Wolf
                                           ------------------------------------
                                           Dennis P. Wolf
                                           Senior Vice President of Finance and
                                           Administration, Chief Financial Officer