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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="right" style="font-size: 10pt; margin-top: 12pt">As filed
with the Securities and Exchange Commission on November&nbsp;23, 2005<BR>
Registration No.&nbsp;333-
</DIV>


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>

<DIV align="center"><DIV style="font-size: 3pt; margin-top: 12pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM S-8</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT<BR>
Under The Securities Act of 1933</B>
</DIV>

<DIV align="center"><DIV style="font-size: 3pt; margin-top: 12pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>BROCADE COMMUNICATIONS SYSTEMS, INC.</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact name of Registrant as specified in its charter)</DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">Delaware<BR>
(State or other jurisdiction of<BR>
incorporation or organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">77-0409517<BR>
(I.R.S. Employer<BR>
Identification Number)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">1745 Technology Drive<BR>
San Jose, California 95110<BR>
(408)&nbsp;487-8000<BR>
(Address, including zip code, and telephone number, including area code, of Registrant&#146;s principal<BR>
executive offices)
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">THERION SOFTWARE CORPORATION.<BR>
2004 STOCK PLAN
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">(Full title of the plan)
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">Tyler Wall<BR>
Vice President, General Counsel and Secretary<BR>
BROCADE COMMUNICATIONS SYSTEMS, INC.<BR>
1745 Technology Drive<BR>
San Jose, California 95110<BR>
(Telephone number, including area code, of agent for service)<BR>
(408)&nbsp;487-8000
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="1%">&nbsp;</TD>
    <TD width="52%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="23" style="border-bottom: 3px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Proposed</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Amount</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Maximum</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Proposed Maximum</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Amount of</B></TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>Title of Securities to</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>to be</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Offering Price</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Aggregate Offering</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Registration</B></TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>be Registered</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Registered (1)</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Per Share (2)</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Price (2)</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3"><B>Fee</B></TD>
    <TD width="1%">&nbsp;</TD>
</TR>

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    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
                    <TD valign="top" style="border-top: 2px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">Common Stock to
be issued upon
exercise of options
granted under the
Therion Software
Corporation 2004
Stock Plan
</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="bottom" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" valign="bottom" style="border-top: 2px solid #000000">424,822</TD>
    <TD nowrap valign="bottom" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="bottom" style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="left" valign="bottom" style="border-top: 2px solid #000000">$&nbsp;.11</TD>

<TD nowrap valign="bottom" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="bottom" style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="left" valign="bottom" style="border-top: 2px solid #000000">$46,730.42</TD>
    <TD nowrap valign="bottom" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap align="right" valign="bottom" style="border-top: 2px solid #000000">&nbsp;</TD>

<TD align="left" valign="bottom" style="border-top: 2px solid #000000">$5.50</TD>
    <TD nowrap valign="bottom" style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="23" style="border-top: 3px solid #000000">&nbsp;</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" nowrap align="left">(1)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Amount of securities to be registered computed in accordance with Rule
457(h) promulgated under the Securities Act of 1933, as the maximum
number of the Registrant&#146;s Common Stock issuable under the Therion
Software Corporation 2004 Stock Plan. This Registration Statement shall
also cover any additional shares of Registrant&#146;s Common Stock that become
issuable under the Therion Software Corporation 2004 Stock Plan by reason
of any stock dividend, stock split, recapitalization or any other similar
transaction effected without the Registrant&#146;s receipt of consideration
that results in an increase in the number of the Registrant&#146;s
outstanding shares of Common Stock.</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" nowrap align="left">(2)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Proposed Maximum Offering Price Per Share and Proposed Maximum
Aggregate Offering Price are estimated in accordance with Rule 457(h)
promulgated under the Securities Act of 1933 solely for the purpose of
calculating the amount of registration fee based on the weighted-average
per share exercise price (rounded to the nearest cent) of outstanding
options under the Therion Software Corporation 2004 Stock Plan, the
underlying shares of which are registered hereby.</TD>
</TR>

</TABLE>
</DIV>

<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<!-- TOC -->
<A name="toc"><DIV align="CENTER" style="page-break-before:always"><U><B>TABLE OF CONTENTS</B></U></DIV></A>

<P><CENTER>
<TABLE border="0" width="90%" cellpadding="0" cellspacing="0">
<TR>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="76%"></TD>
</TR>
<TR><TD colspan="9"><A HREF="#000">PART II</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#001">Item&nbsp;3. Information Incorporated by Reference.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#002">Item&nbsp;4. Description of Securities.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#003">Item&nbsp;5. Interests of Named Experts and Counsel.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#004">Item&nbsp;6. Indemnification of Directors and Officers.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#005">Item&nbsp;7. Exemption from Registration Claimed.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#006">Item&nbsp;8. Exhibits.</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#007">Item&nbsp;9. Undertakings.</A></TD></TR>
<TR><TD colspan="9"><A HREF="#008">SIGNATURES</A></TD></TR>
<TR><TD colspan="9"><A HREF="#009">POWER OF ATTORNEY</A></TD></TR>
<TR><TD colspan="9"><A HREF="#010">INDEX TO EXHIBITS</A></TD></TR>
<TR><TD colspan="9"><A HREF="f14679exv5w1.htm">EXHIBIT 5.1</A></TD></TR>
<TR><TD colspan="9"><A HREF="f14679exv23w1.htm">EXHIBIT 23.1</A></TD></TR>
</TABLE>
</CENTER>
<!-- /TOC -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>







<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>BROCADE COMMUNICATIONS SYSTEMS, INC.<BR>
REGISTRATION STATEMENT ON FORM S-8</B>
</DIV>

<!-- link1 "PART II" -->
<DIV align="left"><A NAME="000"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART II</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B>
</DIV>

<!-- link2 "Item&nbsp;3. Information Incorporated by Reference." -->
<DIV align="left"><A NAME="001"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;3. Information Incorporated by Reference</B>.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;There are hereby incorporated by reference in this Registration Statement the following
documents:
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">1.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The description of the Registrant&#146;s Common Stock contained in the Registrant&#146;s
Registration Statement on Form 8-A dated March&nbsp;19, 1999, and any further amendment or report filed
hereafter for the purpose of updating such description; and</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">2.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s amended Annual Report on Form 10-K/A
for fiscal year ended October&nbsp;29, 2005;</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">3.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Quarterly Report on Form 10-Q for the fiscal quarter ended January
29, 2005 filed with the SEC on March&nbsp;9, 2005, and as amended by
Amendment No.&nbsp;1 filed with the SEC on November&nbsp;14,&nbsp;2005;</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">4.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Quarterly Report on Form 10-Q for the second fiscal quarter ended April
30, 2005;</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">5.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Quarterly Report on Form 10-Q for the third fiscal quarter ended July&nbsp;30,
2005; and</TD>
</TR>
</table>
</div>


<DIV style="margin-top: 6pt">

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">6.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Forms&nbsp;8-K filed with the SEC on
December&nbsp;17, 2004, January&nbsp;6, 2005, January&nbsp;24, 2005
(except Item 2.02 and Item 9.01 as it relates to Item 2.02), February&nbsp;15, 2005,
February&nbsp;22, 2005, February&nbsp;24, 2005, March&nbsp;11, 2005,
April&nbsp;27, 2005,

May&nbsp;4, 2005,
May&nbsp;16, 2005, June&nbsp;8, 2005, June&nbsp;10, 2005,
June&nbsp;13, 2005, June&nbsp;30, 2005 (except Item&nbsp;7.01), July
27, 2005, August&nbsp;23, 2005, September&nbsp;21, 2005,
October&nbsp;4, 2005 and November&nbsp;14, 2005.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All documents filed by the Registrant pursuant to Sections&nbsp;13(a), 13(c), 14 and 15(d) of the
Securities Exchange Act of 1934, as amended, on or after the date of this Registration Statement
and prior to the filing of a post-effective amendment which indicates that all securities offered
have been sold or which deregisters all securities then remaining unsold shall be deemed to be
incorporated by reference in this Registration Statement and to be part hereof from the date of
filing of such documents.
</DIV>
<!-- link2 "Item&nbsp;4. Description of Securities." -->
<DIV align="left"><A NAME="002"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;4. Description of Securities.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
</DIV>
<!-- link2 "Item&nbsp;5. Interests of Named Experts and Counsel." -->
<DIV align="left"><A NAME="003"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;5. Interests of Named Experts and Counsel.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not applicable.
</DIV>
<!-- link2 "Item&nbsp;6. Indemnification of Directors and Officers." -->
<DIV align="left"><A NAME="004"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;6. Indemnification of Directors and Officers.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;145(a) of the Delaware General Corporation Law (the &#147;DGCL&#148;) provides in relevant part
that &#147;&#091;a&#093; corporation shall have power to indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending or completed action, suit or proceeding,
whether civil, criminal, administrative or investigative (other than an action by or in the right
of the corporation) by reason of the fact that the person is or was a director, officer, employee
or agent of the corporation, or is or was serving at the request of the corporation as a director,
officer, employee or agent of another corporation, partnership, joint venture, trust or other
enterprise, against expenses (including attorneys&#146; fees), judgments, fines and amounts paid in
settlement actually and reasonably incurred by the person in connection with such action, suit or
proceeding if the person acted in good faith and in a manner the person reasonably believed to be
in or not opposed to the best interests of the corporation, and, with respect to any criminal
action or proceeding, had no reasonable cause to believe the person&#146;s conduct was unlawful.&#148; With
respect to derivative actions, Section 145(b) of the DGCL provides in relevant part that &#147;&#091;a&#093;
corporation shall have power to indemnify any person who was or is a party or is threatened to be
made a party to any threatened, pending or completed action or suit by or in the right of the
corporation to procure a judgment in its favor...&#091;by reason of the person&#146;s service in one of the
capacities specified in the preceding sentence&#093; against expenses (including attorneys&#146; fees)
actually and reasonably incurred by the person in connection with the defense or settlement of such
action or suit if the person acted in good faith and in a manner the person reasonably believed to
be in or not opposed to the best interests of the corporation and except that no indemnification
shall be made in respect of any claim, issue or matter as to which such person shall have been
adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery
or the court in which such action or suit was brought shall determine upon application that,
despite the adjudication of liability but in view of all the circumstances of the case, such person
is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or
such other court shall deem proper.&#148;
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant&#146;s Amended and Restated Certificate of Incorporation provides that to the
fullest extent permitted by the DGCL, no director of the Registrant shall be personally liable to
the Registrant or its stockholders for monetary damages for breach of fiduciary duty as a director.
The Restated Certificate of Incorporation also provides that no amendment or repeal of such
provision shall apply to or have any effect on the right to indemnification permitted thereunder
with respect to claims arising from acts or omissions occurring in whole or in part before the
effective date of such amendment or repeal whether asserted before or after such amendment or
repeal.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant&#146;s bylaws provide for the indemnification of officers, directors and third
parties acting on behalf of the Registrant if such person acted in good faith and in a manner
reasonably believed to be in and not opposed to the best interest of the Registrant, and, with
respect to any criminal action or proceeding, the indemnified party had no reason to believe his or
her conduct was unlawful. The Registrant has entered into indemnification agreements with its
directors and executive officers and intends to enter into indemnification agreements with any new
directors and executive officers in the future.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant carries officer and director liability insurance with respect to certain
matters, including matters arising under the Securities Act.
</DIV>
<!-- link2 "Item&nbsp;7. Exemption from Registration Claimed." -->
<DIV align="left"><A NAME="005"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;7. Exemption from Registration Claimed.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not Applicable.
</DIV>
<!-- link2 "Item&nbsp;8. Exhibits." -->
<DIV align="left"><A NAME="006"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;8. Exhibits.</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="3%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="94%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>No.</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<tr><td>&nbsp;</td></tr>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Therion Software Corporation 2004 Stock Plan (incorporated by
reference from Exhibit&nbsp;10.1 to the Company&#146;s Form&nbsp;10-Q for the third
fiscal quarter ended July&nbsp;30, 2005, filed with the SEC on November
14, 2005)</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Wilson Sonsini Goodrich &#038; Rosati, Professional Corporation</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Independent Registered Public Accounting Firm</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Counsel (contained in Exhibit&nbsp;5.1)</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (see page 5)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link2 "Item&nbsp;9. Undertakings." -->
<DIV align="left"><A NAME="007"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;9. Undertakings.</B>
</DIV>


<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" nowrap align="left">A)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The undersigned registrant hereby undertakes:</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">1)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>To file, during any period in which offers or sales are being made, a post-effective
amendment to this registration statement:</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="6%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>(i)</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>To include any prospectus required by Section&nbsp;10(a)(3) of the Securities Act of 1933;</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="6%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>(ii)</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>To reflect in the prospectus any facts or events arising after the effective date of
the registration statement (or the most recent post-effective amendment thereof) which,
individually or in the aggregate, represent a fundamental change in the information set forth in
the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of
securities offered (if the total dollar value of securities offered would not exceed that which was
registered) and any deviation from the low or high end of the estimated maximum offering range may
be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) (&#167;
230.424(b) of this chapter) if, in the aggregate, the changes in volume and price represent no more
than a 20% change in the maximum aggregate offering price set forth in the &#147;Calculation of
Registration Fee&#148; table in the effective registration statement.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="6%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left"><B>(iii)</B></TD>
    <TD width="1%">&nbsp;</TD>
    <TD>To include any material information with respect to the plan of distribution not
previously disclosed in the registration statement or any material change to such information in
the registration statement;</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<I>Provided, however, </I>that paragraphs (1)(i) and (1)(ii) do not apply if the information required
to be included in a post-effective amendment by those paragraphs is contained in periodic reports
filed with or furnished to the Commission by the registrant pursuant to Section&nbsp;13 or 15(d) of the
Exchange Act that are incorporated by reference herein.
</DIV>


</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">2)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>That, for the purpose of determining any liability under the Securities
Act, such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and
the offering of such securities at that time shall be deemed to be the
initial bona fide offering thereof.</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">3)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>To remove from registration by means of a post-effective amendment any of
the securities being registered which remain unsold at the termination of
the offering.</TD>
</TR>

</TABLE>
</DIV>
<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" nowrap align="left">B)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
registrant&#146;s annual report pursuant to Section 13(a) or Section 15(d) of
the Exchange Act (and, where applicable, each filing of an employee
benefit plan&#146;s annual report pursuant to Section 15(d) of the Exchange
Act) that is incorporated by reference in the registration statement
shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at that
time shall be deemed to be the initial bona fide offering thereof.</TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" nowrap align="left">C)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of
the registrant pursuant to the foregoing provisions, or otherwise, the
registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as
expressed in the Securities Act and is, therefore, unenforceable. In the
event that a claim for indemnification against such liabilities (other
than the payment by the registrant of expenses incurred or paid by a
director, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities
being registered, the registrant will, unless in the opinion of its
counsel the matter has been settled by controlling precedent, submit to a
court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such
issue.</TD>
</TR>

</TABLE>
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;


<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link1 "SIGNATURES" -->
<DIV align="left"><A NAME="008"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies
that it has reasonable grounds to believe that it meets all of the requirements for filing on Form
S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned,
thereunto, duly authorized, in the City of San Jose, State of
California, on November&nbsp;22, 2005.
</DIV>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">BROCADE COMMUNICATIONS SYSTEMS, INC. <BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Antonio Canova</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Antonio Canova    &nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Vice President, Finance and Chief Financial Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>
<!-- link1 "POWER OF ATTORNEY" -->
<DIV align="left"><A NAME="009"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>POWER OF ATTORNEY</B>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes
and appoints Michael Klayko, and Antonio Canova, and each of them, his true and lawful
attorneys-in-fact, each with full power of substitution, for him in any and all capacities, to sign
any amendments to this registration statement on Form S-8 and to file the same, with exhibits thereto and other
documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying
and confirming all that each of said attorneys-in-fact or their substitute or substitutes may do or
cause to be done by virtue hereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, this registration statement has been
signed below by the following persons and in the capacities and on the
dates indicated:
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="10%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Signature</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Date</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<tr><td>&nbsp;</td></tr>
<TR valign="bottom">
    <TD align="center" valign="top">/s/ Michael Klayko<BR>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Michael Klayko</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">
Chief Executive Officer (Principal
Executive Officer and Director)
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">November&nbsp;22, 2005</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" valign="top">/s/ Antonio Canova<BR>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Antonio Canova</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">
Vice President, Administration and
Chief Financial Officer (Principal
Financial and Accounting Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">November&nbsp;22, 2005</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" valign="top">/s/ David&nbsp;L. House<BR>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
David L. House</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">
Executive Chairman
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">November&nbsp;21, 2005</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" valign="top">/s/ L. William Krause<BR>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
L. William Krause</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">
Lead Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">November&nbsp;19, 2005</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" valign="top">/s/ Neal Dempsey<BR>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Neal Dempsey</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">
Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">November&nbsp;22, 2005</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" valign="top">/s/ Seth D. Neiman<BR>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Seth D. Neiman</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">
Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">November&nbsp;21, 2005</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" valign="top">/s/ Christopher B. Paisley<BR>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Christopher B. Paisley</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">
Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">November&nbsp;21, 2005</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" valign="top">/s/ Sanjay Vaswani<BR>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Sanjay Vaswani</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">
Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">November&nbsp;21, 2005</TD>
</TR>
<TR valign="bottom" style="padding-top: 1em">
    <TD align="center" valign="top">/s/ Robert Walker<BR>
<DIV style="font-size: 1pt; border-bottom: 1px solid #000000">&nbsp;</DIV>
Robert Walker</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">
Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="top">November&nbsp;20, 2005</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link1 "INDEX TO EXHIBITS" -->
<DIV align="left"><A NAME="010"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>INDEX TO EXHIBITS</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="3%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="94%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left"><B>Exhibit</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>No.</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Therion Software Corporation 2004 Stock Plan (incorporated by
reference from Exhibit&nbsp;10.1 to the Company&#146;s Form&nbsp;10-Q for the third
fiscal quarter ended July&nbsp;30, 2005, filed with the SEC on November
14, 2005)</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Wilson Sonsini Goodrich &#038; Rosati, Professional Corporation</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Independent Registered Public Accounting Firm</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Counsel (contained in Exhibit&nbsp;5.1)</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (see page 5)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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sv8
Table of Contents
As filed
with the Securities and Exchange Commission on November 23, 2005
Registration No. 333-
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
Under The Securities Act of 1933
BROCADE COMMUNICATIONS SYSTEMS, INC.
(Exact name of Registrant as specified in its charter)
Delaware
(State or other jurisdiction of
incorporation or organization)
77-0409517
(I.R.S. Employer
Identification Number)
1745 Technology Drive
San Jose, California 95110
(408) 487-8000
(Address, including zip code, and telephone number, including area code, of Registrant's principal
executive offices)
THERION SOFTWARE CORPORATION.
2004 STOCK PLAN
(Full title of the plan)
Tyler Wall
Vice President, General Counsel and Secretary
BROCADE COMMUNICATIONS SYSTEMS, INC.
1745 Technology Drive
San Jose, California 95110
(Telephone number, including area code, of agent for service)
(408) 487-8000
Proposed
Amount
Maximum
Proposed Maximum
Amount of
Title of Securities to
to be
Offering Price
Aggregate Offering
Registration
be Registered
Registered (1)
Per Share (2)
Price (2)
Fee
Common Stock to
be issued upon
exercise of options
granted under the
Therion Software
Corporation 2004
Stock Plan
424,822
$ .11
$46,730.42
$5.50
(1)
Amount of securities to be registered computed in accordance with Rule
457(h) promulgated under the Securities Act of 1933, as the maximum
number of the Registrant's Common Stock issuable under the Therion
Software Corporation 2004 Stock Plan. This Registration Statement shall
also cover any additional shares of Registrant's Common Stock that become
issuable under the Therion Software Corporation 2004 Stock Plan by reason
of any stock dividend, stock split, recapitalization or any other similar
transaction effected without the Registrant's receipt of consideration
that results in an increase in the number of the Registrant's
outstanding shares of Common Stock.
(2)
The Proposed Maximum Offering Price Per Share and Proposed Maximum
Aggregate Offering Price are estimated in accordance with Rule 457(h)
promulgated under the Securities Act of 1933 solely for the purpose of
calculating the amount of registration fee based on the weighted-average
per share exercise price (rounded to the nearest cent) of outstanding
options under the Therion Software Corporation 2004 Stock Plan, the
underlying shares of which are registered hereby.
TABLE OF CONTENTS
PART II
Item 3. Information Incorporated by Reference.
Item 4. Description of Securities.
Item 5. Interests of Named Experts and Counsel.
Item 6. Indemnification of Directors and Officers.
Item 7. Exemption from Registration Claimed.
Item 8. Exhibits.
Item 9. Undertakings.
SIGNATURES
POWER OF ATTORNEY
INDEX TO EXHIBITS
EXHIBIT 5.1
EXHIBIT 23.1
Table of Contents
BROCADE COMMUNICATIONS SYSTEMS, INC.
REGISTRATION STATEMENT ON FORM S-8
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
Item 3. Information Incorporated by Reference
.
There are hereby incorporated by reference in this Registration Statement the following
documents:
1.
The description of the Registrant's Common Stock contained in the Registrant's
Registration Statement on Form 8-A dated March 19, 1999, and any further amendment or report filed
hereafter for the purpose of updating such description; and
2.
The Registrant's amended Annual Report on Form 10-K/A
for fiscal year ended October 29, 2005;
3.
The Registrant's Quarterly Report on Form 10-Q for the fiscal quarter ended January
29, 2005 filed with the SEC on March 9, 2005, and as amended by
Amendment No. 1 filed with the SEC on November 14, 2005;
4.
The Registrant's Quarterly Report on Form 10-Q for the second fiscal quarter ended April
30, 2005;
5.
The Registrant's Quarterly Report on Form 10-Q for the third fiscal quarter ended July 30,
2005; and
6.
The Registrant's Forms 8-K filed with the SEC on
December 17, 2004, January 6, 2005, January 24, 2005
(except Item 2.02 and Item 9.01 as it relates to Item 2.02), February 15, 2005,
February 22, 2005, February 24, 2005, March 11, 2005,
April 27, 2005,

May 4, 2005,
May 16, 2005, June 8, 2005, June 10, 2005,
June 13, 2005, June 30, 2005 (except Item 7.01), July
27, 2005, August 23, 2005, September 21, 2005,
October 4, 2005 and November 14, 2005.
All documents filed by the Registrant pursuant to Sections 13(a), 13(c), 14 and 15(d) of the
Securities Exchange Act of 1934, as amended, on or after the date of this Registration Statement
and prior to the filing of a post-effective amendment which indicates that all securities offered
have been sold or which deregisters all securities then remaining unsold shall be deemed to be
incorporated by reference in this Registration Statement and to be part hereof from the date of
filing of such documents.
Item 4. Description of Securities.
Not applicable.
Item 5. Interests of Named Experts and Counsel.
Not applicable.
Item 6. Indemnification of Directors and Officers.
Section 145(a) of the Delaware General Corporation Law (the "DGCL") provides in relevant part
that "[a] corporation shall have power to indemnify any person who was or is a party or is
threatened to be made a party to any threatened, pending or completed action, suit or proceeding,
whether civil, criminal, administrative or investigative (other than an action by or in the right
of the corporation) by reason of the fact that the person is or was a director, officer, employee
or agent of the corporation, or is or was serving at the request of the corporation as a director,
officer, employee or agent of another corporation, partnership, joint venture, trust or other
enterprise, against expenses (including attorneys' fees), judgments, fines and amounts paid in
settlement actually and reasonably incurred by the person in connection with such action, suit or
proceeding if the person acted in good faith and in a manner the person reasonably believed to be
in or not opposed to the best interests of the corporation, and, with respect to any criminal
action or proceeding, had no reasonable cause to believe the person's conduct was unlawful." With
respect to derivative actions, Section 145(b) of the DGCL provides in relevant part that "[a]
corporation shall have power to indemnify any person who was or is a party or is threatened to be
made a party to any threatened, pending or completed action or suit by or in the right of the
corporation to procure a judgment in its favor...[by reason of the person's service in one of the
capacities specified in the preceding sentence] against expenses (including attorneys' fees)
actually and reasonably incurred by the person in connection with the defense or settlement of such
action or suit if the person acted in good faith and in a manner the person reasonably believed to
be in or not opposed to the best interests of the corporation and except that no indemnification
shall be made in respect of any claim, issue or matter as to which such person shall have been
adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery
or the court in which such action or suit was brought shall determine upon application that,
despite the adjudication of liability but in view of all the circumstances of the case, such person
is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or
such other court shall deem proper."
The Registrant's Amended and Restated Certificate of Incorporation provides that to the
fullest extent permitted by the DGCL, no director of the Registrant shall be personally liable to
the Registrant or its stockholders for monetary damages for breach of fiduciary duty as a director.
The Restated Certificate of Incorporation also provides that no amendment or repeal of such
provision shall apply to or have any effect on the right to indemnification permitted thereunder
with respect to claims arising from acts or omissions occurring in whole or in part before the
effective date of such amendment or repeal whether asserted before or after such amendment or
repeal.
The Registrant's bylaws provide for the indemnification of officers, directors and third
parties acting on behalf of the Registrant if such person acted in good faith and in a manner
reasonably believed to be in and not opposed to the best interest of the Registrant, and, with
respect to any criminal action or proceeding, the indemnified party had no reason to believe his or
her conduct was unlawful. The Registrant has entered into indemnification agreements with its
directors and executive officers and intends to enter into indemnification agreements with any new
directors and executive officers in the future.
The Registrant carries officer and director liability insurance with respect to certain
matters, including matters arising under the Securities Act.
Item 7. Exemption from Registration Claimed.
Not Applicable.
Item 8. Exhibits.
Exhibit
No.
Description
4.1
Therion Software Corporation 2004 Stock Plan (incorporated by
reference from Exhibit 10.1 to the Company's Form 10-Q for the third
fiscal quarter ended July 30, 2005, filed with the SEC on November
14, 2005)
5.1
Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation
23.1
Consent of Independent Registered Public Accounting Firm
23.2
Consent of Counsel (contained in Exhibit 5.1)
24.1
Power of Attorney (see page 5)
Table of Contents
Item 9. Undertakings.
A)
The undersigned registrant hereby undertakes:
1)
To file, during any period in which offers or sales are being made, a post-effective
amendment to this registration statement:
(i)
To include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;
(ii)
To reflect in the prospectus any facts or events arising after the effective date of
the registration statement (or the most recent post-effective amendment thereof) which,
individually or in the aggregate, represent a fundamental change in the information set forth in
the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of
securities offered (if the total dollar value of securities offered would not exceed that which was
registered) and any deviation from the low or high end of the estimated maximum offering range may
be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) (§
230.424(b) of this chapter) if, in the aggregate, the changes in volume and price represent no more
than a 20% change in the maximum aggregate offering price set forth in the "Calculation of
Registration Fee" table in the effective registration statement.
(iii)
To include any material information with respect to the plan of distribution not
previously disclosed in the registration statement or any material change to such information in
the registration statement;
Provided, however,
that paragraphs (1)(i) and (1)(ii) do not apply if the information required
to be included in a post-effective amendment by those paragraphs is contained in periodic reports
filed with or furnished to the Commission by the registrant pursuant to Section 13 or 15(d) of the
Exchange Act that are incorporated by reference herein.
2)
That, for the purpose of determining any liability under the Securities
Act, such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and
the offering of such securities at that time shall be deemed to be the
initial bona fide offering thereof.
3)
To remove from registration by means of a post-effective amendment any of
the securities being registered which remain unsold at the termination of
the offering.
B)
The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
registrant's annual report pursuant to Section 13(a) or Section 15(d) of
the Exchange Act (and, where applicable, each filing of an employee
benefit plan's annual report pursuant to Section 15(d) of the Exchange
Act) that is incorporated by reference in the registration statement
shall be deemed to be a new registration statement relating to the
securities offered therein, and the offering of such securities at that
time shall be deemed to be the initial bona fide offering thereof.
C)
Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of
the registrant pursuant to the foregoing provisions, or otherwise, the
registrant has been advised that in the opinion of the Securities and
Exchange Commission such indemnification is against public policy as
expressed in the Securities Act and is, therefore, unenforceable. In the
event that a claim for indemnification against such liabilities (other
than the payment by the registrant of expenses incurred or paid by a
director, officer or controlling person of the registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities
being registered, the registrant will, unless in the opinion of its
counsel the matter has been settled by controlling precedent, submit to a
court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such
issue.
Table of Contents
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies
that it has reasonable grounds to believe that it meets all of the requirements for filing on Form
S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned,
thereunto, duly authorized, in the City of San Jose, State of
California, on November 22, 2005.
BROCADE COMMUNICATIONS SYSTEMS, INC.
By:
/s/ Antonio Canova
Antonio Canova
Vice President, Finance and Chief Financial Officer
POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes
and appoints Michael Klayko, and Antonio Canova, and each of them, his true and lawful
attorneys-in-fact, each with full power of substitution, for him in any and all capacities, to sign
any amendments to this registration statement on Form S-8 and to file the same, with exhibits thereto and other
documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying
and confirming all that each of said attorneys-in-fact or their substitute or substitutes may do or
cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Act of 1933, this registration statement has been
signed below by the following persons and in the capacities and on the
dates indicated:
Signature
Title
Date
/s/ Michael Klayko
Michael Klayko
Chief Executive Officer (Principal
Executive Officer and Director)
November 22, 2005
/s/ Antonio Canova
Antonio Canova
Vice President, Administration and
Chief Financial Officer (Principal
Financial and Accounting Officer)
November 22, 2005
/s/ David L. House
David L. House
Executive Chairman
November 21, 2005
/s/ L. William Krause
L. William Krause
Lead Director
November 19, 2005
/s/ Neal Dempsey
Neal Dempsey
Director
November 22, 2005
/s/ Seth D. Neiman
Seth D. Neiman
Director
November 21, 2005
/s/ Christopher B. Paisley
Christopher B. Paisley
Director
November 21, 2005
/s/ Sanjay Vaswani
Sanjay Vaswani
Director
November 21, 2005
/s/ Robert Walker
Robert Walker
Director
November 20, 2005
Table of Contents
INDEX TO EXHIBITS
Exhibit
No.
Description
4.1
Therion Software Corporation 2004 Stock Plan (incorporated by
reference from Exhibit 10.1 to the Company's Form 10-Q for the third
fiscal quarter ended July 30, 2005, filed with the SEC on November
14, 2005)
5.1
Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation
23.1
Consent of Independent Registered Public Accounting Firm
23.2
Consent of Counsel (contained in Exhibit 5.1)
24.1
Power of Attorney (see page 5)