EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in this Registration Statement of Network Appliance, Inc. on Form S-8 of our report dated May 14, 2001, appearing in the Annual Report on Form 10-K of Network Appliance, Inc. for the year ended April 27, 2001. /s/ Deloitte & Touche LLP DELOITTE & TOUCHE LLP San Jose, California November 19, 2001