SEC Form 4

FORM 4		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 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* BARNUM GREGORY T (Last) (First) (Middle) 6000 NATHAN LANE NORTH (Street) PLYMOUTH MN 55442 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol COMPUTER NETWORK TECHNOLOGY CORP [ CMNT ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) CFO and Secretary
	3. Date of Earliest Transaction (Month/Day/Year) 06/01/2005
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	06/01/2005		D		32,194(1)	D	(2)	0	D
Common Stock	06/01/2005		D		1,099	D	(3)	0	I	Through the Company's 401(k) plan

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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
Incentive Stock Option (right to buy)	$9.6875	06/01/2005		D			11,709	(4)	12/09/2008	Common Stock	11,709	(4)	0	D
Non-Qualified Stock Option (right to buy)	$9.6875	06/01/2005		D			18,291	(5)	12/09/2008	Common Stock	18,291	(5)	0	D
Non-Qualified Stock Option (right to buy)	$21.875	06/01/2005		D			84,179	(6)	05/12/2009	Common Stock	84,179	(6)	0	D
Incentive Stock Option (right to buy)	$21.875	06/01/2005		D			5,821	(7)	05/12/2009	Common Stock	5,821	(7)	0	D
Non-Qualified Stock Option (right to buy)	$8.7812	06/01/2005		D			67,225	(8)	04/04/2011	Common Stock	67,225	(8)	0	D
Incentive Stock Option (right to buy)	$8.7812	06/01/2005		D			22,775	(9)	04/04/2011	Common Stock	22,775	(9)	0	D
Non-Qualified Stock Option (right to buy)	$10.01	06/01/2005		D			2,503	(10)	04/25/2011	Common Stock	2,503	(10)	0	D
Non-Qualified Stock Option (right to buy)	$11.35	06/01/2005		D			18,750	(11)	02/24/2012	Common Stock	18,750	(11)	0	D
Incentive Stock Option (right to buy)	$11.35	06/01/2005		D			6,250	(12)	02/24/2012	Common Stock	6,250	(12)	0	D
Non-Qualified Stock Option (right to buy)	$4.53	06/01/2005		D			23,583	(13)	10/06/2012	Common Stock	23,583	(13)	0	D
Incentive Stock Option (right to buy)	$4.53	06/01/2005		D			6,417	(14)	10/06/2012	Common Stock	6,417	(14)	0	D
Non-Qualified Stock Option (right to buy)	$6.57	06/01/2005		D			22,500	(15)	03/04/2013	Common Stock	22,500	(15)	0	D
Incentive Stock Option (right to buy)	$6.57	06/01/2005		D			7,500	(16)	03/04/2012	Common Stock	7,500	(16)	0	D

Explanation of Responses:

1. Includes award of 16,000 restricted stock units, all of which will vest upon completion of the merger.

2. Disposed of pursuant to Agreement and Plan of Merger among Issuer, McData Corporation and Condor Acqusition, Inc. in exchange for 21,052 shares of McData Class A common stock and 20,800 restricted stock units for McData Class A common stock, respectively, having a market value of $3.76 per share on the effective date of the merger, together with cash in lieu of fractional shares.

3. Disposed of pursuant to Agreement and Plan of Merger among Issuer, McData Corporation and Condor Acquisition, Inc. in exchange for 1,428 shares of McData Class A common stock having a market value of $3.76 per share on the effective date of the merger, together with cash in lieu of fractional shares.

4. This fully vested option granted on December 10, 1998 was assumed by McData Corporation and replaced with an option to acquire 15,221 shares of McData Class A common stock for $7.45 per share, together with cash in lieu of fractional shares.

5. This fully vested option granted on December 10, 1998 was assumed by McData Corporation and replaced with an option to acquire 23,778 shares of McData Class A common stock for $7.45 per share, together with cash in lieu of fractional shares.

6. This fully vested option granted on May 13, 1999 was assumed by McData Corporation and replaced with an option to acquire 109,432 shares of McData Class A common stock for $16.83 per share, together with cash in lieu of fractional shares.

7. This fully vested option granted on May 13, 1999 was assumed by McData Corporation and replaced with an option to acquire 7,567 shares of McData Class A common stock for $16.83 per share, together with cash in lieu of fractional shares.

8. This fully vested option granted on April 5, 2001 was assumed by McData Corporation and replaced with an option to acquire 87,392 shares of McData Class A common stock for $6.75 per share, together with cash in lieu of fractional shares.

9. This fully vested option granted on April 5, 2001 was assumed by McData Corporation and replaced with an option to acquire 29,607 shares of McData Class A common stock for $6.75 per share, together with cash in lieu of fractional shares.

10. This fully vested option granted on April 26, 2001 was assumed by McData Corporation and replaced with an option to acquire 3,253 shares of McData Class A common stock for $7.70 per share, together with cash in lieu of fractional shares.

11. This fully vested option granted on February 25, 2002 was assumed by McData Corporation and replaced with an option to acquire 24,375 shares of McData Class A common stock for $8.73 per share.

12. This option, which was granted on February 25, 2002 and provided for vesting on February 25, 2006, was assumed by McData Corporation and replaced with an option to acquire 8,125 shares of McData Class A common stock for $8.73 per share. Notwithstanding the foregoing, this option will fully vest if employment is terminated without cause upon completion of the merger.

13. This partially vested option, which was granted on October 7, 2002 and provided for vesting of 7,499 options on October 7, 2005 and 1,085 options on October 7, 2006, respectively, was assumed by McData Corporation and replaced with an option to acquire 30,657 shares of McData Class A common stock for $3.48 per share, together with cash in lieu of fractional shares. Notwithstanding the foregoing, this option will fully vest if employment is terminated without cause upon completion of the merger.

14. This partially vested option, which was granted on October 7, 2002 and provided for vesting of one option on October 7, 2005 and 6,415 options on October 7, 2006, respectively, was assumed by McData Corporation and replaced with an option to acquire 8,342 shares of McData Class A common stock for $3.48 per share, together with cash in lieu of fractional shares. Notwithstanding the foregoing, this option will fully vest if employment is terminated without cause upon completion of the merger.

15. This partially vested option, which was granted on March 5, 2003 and provided for vesting of 7,500 options on March 5, 2006, was assumed by McData Corporation and replaced with an option to acquire 29,250 shares of McData Class A common stock for $5.05 per share. Notwithstanding the foregoing, this option will fully vest if employment is terminated without cause upon completion of the merger.

16. This option, which was granted on March 5, 2003 and provided for vesting on March 5, 2007, was assumed by McData Corporation and replaced with an option to acquire 9,750 shares of McData Class A common stock for $5.05 per share. Notwithstanding the foregoing, this option will vest if employment is terminated without cause upon completion of the merger.

Remarks:

	/s/ Gregory T. Barnum, Attorney-in-fact	06/01/2005
	** Signature of Reporting Person	Date
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