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 10, 2002, appearing in the Annual Report on Form 10-K of Network Appliance, Inc. for the year ended April 30, 2002. /s/ DELOITTE & TOUCHE LLP DELOITTE & TOUCHE LLP San Jose, California October 28, 2002