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: September 7, 2001
  
  
                                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)
  
  
                                   250 Holger Way
                                 San Jose, CA 95134
                                   (408) 571-5000
  --------------------------------------------------------------------------------
          (Addresses, including zip code, and telephone numbers, including
                     area code, of principal executive offices)
  
  <PAGE>
  
  
  ITEM 5.      OTHER EVENTS.
  
         A copy of a portion of the Registrant's press release dated August 29,
  2001, relating to Redback's announcement that it had appointed Kevin DeNuccio
  its new President Chief Executive Officer and a Director.
  
         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-Q, 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 August 29, 2001
  
  <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:  September 7, 2001           By:  /s/ Dennis P. Wolf
                                          ----------------------------------------
                                          Dennis P. Wolf
                                          Senior Vice President of Finance and
                                          Administration, Chief Financial Officer
                                          and Corporate Secretary
metadata_documents: [{"type": "8-K", "sequence": "1", "filename": "d8k.txt", "description": "FORM 8-K", "secsgml_size_bytes": 3088}]
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": "1733533"}, "business-address": {"street1": "250 HOLGER WAY", "city": "SAN JOSE", "state": "CA", "zip": "95134*1306", "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: September 7, 2001
  
                                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)
  
                                   250 Holger Way
                                 San Jose, CA 95134
                                   (408) 571-5000
  --------------------------------------------------------------------------------
          (Addresses, including zip code, and telephone numbers, including
                     area code, of principal executive offices)
  ITEM 5.      OTHER EVENTS.
  
         A copy of a portion of the Registrant's press release dated August 29,
  2001, relating to Redback's announcement that it had appointed Kevin DeNuccio
  its new President Chief Executive Officer and a Director.
  
         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-Q, 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 August 29, 2001
  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:  September 7, 2001           By:  /s/ Dennis P. Wolf
                                          ----------------------------------------
                                          Dennis P. Wolf
                                          Senior Vice President of Finance and
                                          Administration, Chief Financial Officer
                                          and Corporate Secretary