Exhibit 23.1


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption "Experts" in
Amendment 5 to the Registration Statement (Form S-3 No. 333-106889) and related
Prospectus of Juniper Networks Inc. for the registration of the Company's Zero
Coupon Convertible Senior Notes due June 15, 2008 and 19,860,973 shares of its
common stock and to the incorporation by reference therein of our report dated
January 14, 2003, with respect to the consolidated financial statements and
schedule of Juniper Networks, Inc. included in its Annual Report (Form 10-K)
for the year ended December 31, 2002, filed with the Securities and Exchange
Commission.


/s/ Ernst & Young LLP
San Jose, California
November 14, 2003