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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 PB4ne9pj0RnrKY2b10pdhykqAbnxjxrM9YVOfHdu92qUhNTGAeX1mjoBpI2iP9ZB
 NFzZyGY5O9DYSBKm2dllkA==

<SEC-DOCUMENT>0001209191-03-017914.txt : 20030819
<SEC-HEADER>0001209191-03-017914.hdr.sgml : 20030819
<ACCEPTANCE-DATETIME>20030819191624
ACCESSION NUMBER:		0001209191-03-017914
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030815
FILED AS OF DATE:		20030819

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BROCADE COMMUNICATIONS SYSTEMS INC
		CENTRAL INDEX KEY:			0001009626
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER COMMUNICATIONS EQUIPMENT [3576]
		IRS NUMBER:				770409517
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1028

	BUSINESS ADDRESS:	
		STREET 1:		1745 TECHNOLOGY DRIVE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110

	MAIL ADDRESS:	
		STREET 1:		1745 TECHNOLOGY DRIVE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95110

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KLAYKO MICHAEL
		CENTRAL INDEX KEY:			0001229129

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25601
		FILM NUMBER:		03856845

	BUSINESS ADDRESS:	
		STREET 1:		C/O BROCADE COMMUNICATIONS SYSTEMS INC
		STREET 2:		1745 TECHNOLOGY DRIVE
		CITY:			SAN JOSE
		STATE:			CA
		ZIP:			95118
		BUSINESS PHONE:		4083925019
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>bpa92594_bpa5mk.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-15</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001009626</issuerCik><issuerName>BROCADE COMMUNICATIONS SYSTEMS INC</issuerName>        <issuerTradingSymbol>BRCD</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001229129</rptOwnerCik><rptOwnerName>KLAYKO MICHAEL</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1></rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>SAN JOSE</rptOwnerCity><rptOwnerState>CA</rptOwnerState><rptOwnerZipCode>95110</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP &amp; GM, Silkworm FAP</officerTitle></reportingOwnerRelationship></reportingOwner><nonDer
ivativeTable><nonDerivativeHolding><securityTitle><value>Common Stock</value><footnoteId id="F1" /></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>733512</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>by Partnership</value><footnoteId id="F1" /></natureOfOwnership></ownershipNature></nonDerivativeHolding><nonDerivativeHolding><securityTitle><value>Common Stock</value><footnoteId id="F2" /></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>30889</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>by Son</value><footnoteId id="F2" /></natureOfOwnership></ownershipNature></nonDerivativeHolding><nonDerivativeHolding><securityTitle><value>Common Stock</value><footnoteId id="F3" /></securityTitle><
postTransactionAmounts><sharesOwnedFollowingTransaction><value>22889</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>by Daughter</value><footnoteId id="F3" /></natureOfOwnership></ownershipNature></nonDerivativeHolding><nonDerivativeHolding><securityTitle><value>Common Stock</value><footnoteId id="F4" /></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>22889</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>by Daughter 2</value><footnoteId id="F4" /></natureOfOwnership></ownershipNature></nonDerivativeHolding><nonDerivativeHolding><securityTitle><value>Common Stock</value><footnoteId id="F5" /></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>22889</value></sharesOwnedFollowingTransaction></p
ostTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>by Daughter 3</value><footnoteId id="F5" /></natureOfOwnership></ownershipNature></nonDerivativeHolding><nonDerivativeHolding><securityTitle><value>Common Stock</value><footnoteId id="F6" /></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>166861</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>by Trust</value><footnoteId id="F6" /></natureOfOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><derivativeTable><derivativeHolding><securityTitle><value>Non-qualified Stock Option (right to buy)</value><footnoteId id="F7" /></securityTitle><conversionOrExercisePrice><value>4.55</value></conversionOrExercisePrice><exerciseDate><value>2004-01-27</value></exerciseDate><expirationDate><value>2013-01-27</va
lue></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>250000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>250000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeHolding><securityTitle><value>Non-qualified Stock Option (right to buy)</value><footnoteId id="F8" /></securityTitle><conversionOrExercisePrice><value>4.55</value></conversionOrExercisePrice><exerciseDate><value>2003-07-27</value></exerciseDate><expirationDate><value>2013-01-27</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>213781</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFol
lowingTransaction><value>213781</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding><derivativeTransaction><securityTitle><value>Non-qualified Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>5.53</value></conversionOrExercisePrice><transactionDate><value>2003-08-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>250000</value></transactionShares><transactionPricePerShare><value>0.00</value><footnoteId id="F9" /></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2003-09-15</value><footnoteId id="F10" /></exerciseDate><expirationDate><value>2010-08-15</valu
e></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>250000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>250000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Beneficial ownership disclosure only.  Shares held by Genesis Management Investments Limited Partnership, over which the Reporting Person and his spouse exercise investment and voting control.</footnote><footnote id="F2">Beneficial ownership disclosure only.  Shares held by Reporting Person's son, as to which Reporting Person disclaims beneficial ownership.</footnote><footnote id="F3">Beneficial ownership disclosure only.  Shares held by Reporting Person's daughter, as to which Reporting Pers
on disclaims beneficial ownership.</footnote><footnote id="F4">Beneficial ownership disclosure only.  Shares held by Reporting Person's daughter 2.</footnote><footnote id="F5">Beneficial ownership disclosure only.  Shares held by Reporting Person's daughter 3.</footnote><footnote id="F6">Beneficial ownership disclosure only.  Shares held by the Klayko Living Trust, over which the Reporting Person and his spouse exercise investment and voting control.</footnote><footnote id="F7">Beneficial ownership disclosure only.  62,500 options vest on January 27, 2004; 187,500 options vest monthly from February 27, 2004 through January 27, 2007.</footnote><footnote id="F8">Beneficial ownership disclosure only.  53,446 options vest on July 27, 2003; 160,335 options vest monthly from August 27, 2003 through July 27, 2005.</footnote><footnote id="F9">The price of the deritive security will be determined at a future date upon exercise of the option.</footnote><footnote id="F10">Options vest monthly from September 15, 2003 th
rough August 15, 2007.</footnote></footnotes><ownerSignature><signatureName>/s/ Antonio Canova, attorney in fact for Michael Klayko</signatureName><signatureDate>2003-08-19</signatureDate></ownerSignature></ownershipDocument>

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</SEC-DOCUMENT>
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