EXHIBIT 23.4



               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" included in
Amendment No. 1 to the Registration Statement (Form S-4 No. 333-113033) and
related Prospectus of Juniper Networks, Inc. for the registration of shares of
common stock and to the incorporation by reference therein of our report dated
October 23, 2003 (except for Note 16, as to which the date is November 14,
2003), with respect to the consolidated financial statements and schedule of
NetScreen Technologies, Inc. included in its Annual Report on Form 10-K for the
year ended September 30, 2003, filed with the Securities and Exchange
Commission.


                                             /s/ Ernst & Young LLP


San Jose, California
March 9, 2004