Sec Form 4 Filing - LALONDE WILLIAM JAMES @ BROCADE COMMUNICATIONS SYSTEMS INC - 2003-08-15

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person LALONDE WILLIAM JAMES 2. Issuer Name and Ticker or Trading Symbol BROCADE COMMUNICATIONS SYSTEMS INC [ BRCD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) VP, International Sales (Last) (First) (Middle) 3. Date of Earliest Transaction (MM/DD/YY) 08/15/2003 (Street) SAN JOSE, CA95110 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock( 1 ) 1,444 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Non-qualified Stock Option (right to buy)( 2 ) $ 6.54 07/10/2003 07/10/2013 Common Stock 2,922 2,922 D Non-qualified Stock Option (right to buy)( 3 ) $ 6.54 07/10/2003 07/10/2013 Common Stock 97,078 97,078 D Non-qualified Stock Option (right to buy)( 4 ) $ 6.54 07/10/2003 07/10/2013 Common Stock 1,975 1,975 D Non-qualified Stock Option (right to buy)( 5 ) $ 6.54 07/10/2003 07/10/2003 Common Stock 65,455 65,455 D Non-qualified Stock Option (right to buy)( 6 ) $ 6.54 07/10/2003 07/10/2013 Common Stock 102,000 102,000 D Non-qualified Stock Option (right to buy)( 7 ) $ 6.54 07/10/2003 07/10/2013 Common Stock 5,000 5,000 D Non-qualified Stock Option (right to buy)( 8 ) $ 6.54 07/10/2003 07/10/2013 Common Stock 125,000 125,000 D Non-qualified Stock Option (right to buy)( 9 ) $ 6.54 07/10/2003 07/10/2013 Common Stock 75,000 75,000 D Non-qualified Stock Option (right to buy) $ 5.53 08/15/2003 A 100,000 09/15/2003( 11 ) 08/15/2010 Common Stock 100,000 $ 0( 10 ) 100,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other LALONDE WILLIAM JAMES SAN JOSE, CA95110 VP, International Sales Signatures /s/ Antonio Canova, attorney in fact for William James LaLonde 08/19/2003 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Beneficial holding disclosure only. ( 2 )Beneficial holding disclosure only. 1,827 options vest on July 10, 2003; 1,095 options vest monthly from July 20, 2003 through December 20, 2004. ( 3 )Beneficial holding disclosure only. 60,674 options vest on July 10, 2003; 36,404 options vest monthly from July 20, 2003 through December 20, 2004. ( 4 )Beneficial holding disclosure only. 1,235 options vest on July 10, 2003; 740 options vest monthly from July 20, 2003 through December 20, 2004. ( 5 )Beneficial holding disclosure only. 40,910 options vest on July 10, 2003; 24,545 options vest monthly from July 20, 2003 through December 20, 2004. ( 6 )Beneficial holding disclosure only. 13,333 options vest on July 10, 2003; 26,667 options vest monthly from August 1, 2003 through November 1, 2004; 62,000 options vest monthly from November 1, 2004 through November 1, 2005. ( 7 )Beneficial holding disclosure only. 5,000 options vest on July 10, 2003. ( 8 )Beneficial holding disclosure only. 54,687 options vest on July 10, 2003; 70,313 options vest monthly from August 1, 2003 through October 1, 2005. ( 9 )Beneficial holding disclosure only. 21,875 options vest on July 10, 2003; 53,125 options vest monthly from August 4, 2003 through December 4, 2004. ( 10 )The price of the deritive security will be determined at a future date upon exercise of the option. ( 11 )Options vest monthly from September 15, 2003 through August 15, 2007.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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