EXHIBIT 32.2

   CERTIFICATION OF THE CHIEF FINANCIAL OFFICER PURSUANT TO SECTION 906 OF THE
                           SARBANES-OXLEY ACT OF 2002

      I, Robert R.B. Dykes, certify, pursuant to 18 U.S.C. Section 1350, as
adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the
Annual Report of Juniper Networks, Inc. on Form 10-K for the year ended December
31, 2004 fully complies with the requirements of Section 13(a) or 15(d) of the
Securities Exchange Act of 1934 and that information contained in such Annual
Report on Form 10-K fairly presents in all material respects the financial
condition and results of operations of Juniper Networks, Inc.

By: /s/ Robert R.B. Dykes
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Name: Robert R.B. Dykes
Title: Executive Vice President, Business Operations and Chief Financial Officer
Date: March 3, 2005