Exhibit 23.1

                               CONSENT OF KPMG LLP

The Board of Directors
Brocade Communications Systems, Inc.

We hereby consent to the incorporation by reference into Brocade Communications
Systems, Inc.'s previously filed Registration Statements on Form S-8 (Nos.
333-117897, 333-103571, 333-85187, 333-95653, 333-39126, 333-53734, 333-64260,
333-72480, and 333-100797) and Form S-3 (No. 333-84698) of our report dated
January 27, 2005 with respect to the consolidated balance sheets of Brocade
Communications Systems, Inc. and subsidiaries as of October 30, 2004 and October
25, 2003, 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 30, 2004, and related financial statement
schedule, which report appears in this annual report on Form 10-K of Brocade
Communications Systems, Inc. for the year ended October 30, 2004. Our report
indicates that the consolidated balance sheet of Brocade Communications Systems,
Inc. and subsidiaries as of October 25, 2003, and the related consolidated
statements of operations, stockholders equity and comprehensive income (loss),
and cash flows for each of the years in the two-year period ended, October 25,
2003 have been restated.



/s/ KPMG LLP

Mountain View, California
January 27, 2005