Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

The Board of Directors
Brocade Communications Systems, Inc.:

We consent to the incorporation by reference in the registration statements on Form S-8 (Nos. 333-129909, 333-129908, 333-117897, 333-103571, 333-100797, 333-72480, 333-64260, 333-53734, 333-39126, 333-95653 and 333-85187), Form S-4 (No. 333-137758) and Form S-3 (No. 333-84698) of Brocade Communications Systems, Inc. of our reports dated January 9, 2007, with respect to the consolidated balance sheets of Brocade Communications Systems, Inc. and subsidiaries as of October 28, 2006 and October 29, 2005, and the related consolidated statements of operations, stockholders’ equity and comprehensive income (loss), and cash flows for each of the years in the three-year period ended October 28, 2006, and the related financial statement schedule, management’s assessment of the effectiveness of internal control over financial reporting as of October 28, 2006, and the effectiveness of internal control over financial reporting as of October 28, 2006, which reports appear in the October 28, 2006, annual report on Form 10-K of Brocade Communications Systems, Inc. Our report dated January 9, 2007 on the consolidated financial statements contains an explanatory paragraph stating that Brocade Communications Systems, Inc. and subsidiaries adopted the provisions of Statement of Financial Accounting Standards No. 123(R), Share-Based Payments.

/s/ KPMG LLP

Mountain View, California
January 9, 2007