Exhibit 10.12

Amendment Number 2

to

OEM Purchase and License Agreement

Between EMC Corporation and Brocade Communications, Inc.

OEM Agreement Number OEM 051208 Dated May 20, 2008

This Amendment Number 2 (“the Amendment”) to the OEM Purchase and License Agreement (the “Agreement”) dated May 20, 2008 BROCADE Communications Systems, Inc., a Delaware corporation with an office located at 1745 Technology Drive, San Jose, California 95110, and BROCADE Communications Switzerland SarL., a Geneva corporation with principal offices at 29 Route de l’Aeroport, Case Postale 105, CH-1215, Geneva 15, Switzerland, and BROCADE Communications Services Switzerland, SarL,, a Geneva corporation with principal offices at 29 Route de l’Aeroport, Case Postale 105, CH-1215, Geneva 15, Switzerland (collectively, “BROCADE”), and EMC Corporation, 176 South Street, Hopkinton, MA 01748 together with its designated Subsidiaries (“EMC”), and commences on the date accepted and executed by BROCADE (“Effective Date”).

RECITALS

WHEREAS, the parties wish to amend the Agreement so as to 1) define Marketing Development Funding; and 2) revise Product Discontinuance requirements;

NOW THEREFORE, in consideration of the above and the other respective promises of the parties set forth herein, the parties hereto agree as follows:

Brocade and EMC have agreed to marketing development funding for the period October 1, 2009 through September 30, 2011 and will automatically renew for additional successive one-year terms unless either party provides [**] days’ notice of termination prior to any renewal periods. The terms and conditions for the program are contained in the “EMC Marketing Development Fund (MDF) Program Guidelines” effective October 1, 2009 (“MDF Guidelines”). Key terms included in the MDF Guidelines as of October 1, 2009 are:

If there is conflict between the terms and conditions in this Section 5.4 and the “EMC Marketing Development Fund (MDF) Program Guidelines effective October 1, 2009” (“MDF Guidelines”) as updated from time to time by mutual agreement of the parties, the MDF Guidelines shall prevail.

8.4 Product Discontinuance: Brocade reserves the right to discontinue Products by notifying EMC in writing at least [**] days prior to the discontinuance date, subject to a mutually agreed upon end of life plan. Prior to such discontinuance date, EMC may place with Brocade [**] purchase order for such discontinued Product including Spares. Such [**] purchase orders may specify that the requested Products be shipped to EMC or EMC’s Customers over the [**] day period following the discontinuance date.

IN WITNESS WHEREOF, the parties hereto have executed this Amendment Number 2 to OEM Purchase and License Agreement by their duly authorized representatives. This Agreement shall not be effective until executed by Brocade and accepted by an authorized representative of EMC.