EXHIBIT 32.2

                    CERTIFICATION OF CHIEF FINANCIAL OFFICER
                  PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED
            PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

      I, Marcel Gani, certify, pursuant to 18 U.S.C. Section 1350, as adopted
pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly
Report of Juniper Networks, Inc. on Form 10-Q for the three months ended
September 30, 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 Quarterly Report on Form 10-Q fairly presents in all material respects the
financial condition and results of operations of Juniper Networks, Inc.

/s/ Marcel Gani
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Marcel Gani
Chief Financial Officer
November 2, 2004