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EXHIBIT 31B

CERTIFICATIONS

I, Michael J. Rockenbach, certify that:

1.     I have reviewed this quarterly report on Form 10-Q of Emulex
Corporation;

2.     Based on my knowledge, this report does not contain any untrue
statement of a material fact or omit to state a material fact necessary to make
the statements made, in light of the circumstances under which such statements
were made, not misleading with respect to the period covered by this report;

3.     Based on my knowledge, the financial statements, and other financial
information included in this report, fairly present in all material respects
the financial condition, results of operations and cash flows of the registrant
as of, and for, the periods presented in this report.

4.     The registrants other certifying officer and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant and have:



| | a) |  | Designed such disclosure controls and
procedures, or caused such disclosure controls and
procedures to be designed under our supervision, to ensure
that material information relating to the registrant,
including its consolidated subsidiaries, is made known to
us by others within those entities, particularly during the
period in which this report in being prepared;
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|
| | b) |  | Evaluated the effectiveness of the
registrants disclosure controls and procedures and
presented in this report our conclusions about the
effectiveness of the disclosure controls and procedures, as
of the end of the period covered by this report based on
such evaluation; and                                                                                           
|
| | c) |  | Disclosed in this report any change in the
registrants internal control over financial reporting that
occurred during the registrants most recent fiscal quarter
that has materially affected, or is reasonably likely to
materially affect, the registrants internal control over
financial reporting; and                                                                

5.     The registrants other certifying officer and I have disclosed, based
on our most recent evaluation of internal control over financial reporting, to
the registrants auditors and the audit committee of registrants board of
directors (or persons performing the equivalent function):



| | a) |  | All significant deficiencies and material
weaknesses in the design or operation of internal control
over financial reporting which are reasonably likely to
adversely affect the registrants ability to record,
process, summarize and report financial information; and
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|
| | b) |  | Any fraud, whether or not material, that
involves management or other employees who have a
significant role in the registrants internal controls over
financial reporting.                                                                                              

Date: February 10, 2004

| |                                               | 
| | --------------------------------------------- | 
| | /s/ Michael J. Rockenbach                     | 
| |                                               | 
| | Michael J. Rockenbach
Chief Financial Officer | 

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