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 OF SECURITIES 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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(Print or Type Responses)

1. Name and Address of Reporting Person * KRIENS SCOTT   2. Issuer Name and Ticker or Trading Symbol JUNIPER NETWORKS INC [JNPR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chairman of the Board (Last) (First) (Middle) 1194 NORTH MATHILDA AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 02/18/2011 (Street) SUNNYVALE, CA 94089 4. If Amendment, Date 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 (City) (State) (Zip) 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 02/18/2011   M   36,400 (1) A $ 0 90,754 D   Common Stock               2,000,000 I 10y Remainder Trust (2) Common Stock               2,000,000 I 20y Remainder Trust (3) Common Stock               202,037 I By Foundation Common Stock               3,531,535 I by 1996 Kriens Trust (4) Common Stock               355,000 I by KDI Trust LP Common Stock               384,750 I by Partnership (5)

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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 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

Performance Shares

$ 0

02/18/2011

M

36,400 (6)

02/18/2011

02/19/2011

Common Stock

36,400

$ 0 (7)

9,100 (8)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
KRIENS SCOTT 1194 NORTH MATHILDA AVENUE SUNNYVALE, CA 94089	X		Chairman of the Board

Signatures

By: Mitchell L. Gaynor, Attorney in Fact For: Scott G. Kriens		02/23/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Represents acquistion of shares vested under the performance share award granted 2/19/2010. The shares vest upon determination of the achievement of certain Company performance targets following the fiscal year end.
(2)	Shares held by the 2010 Kriens 10 Year Charitable Remainder Trust, of which the reporting person holds a pecuniary interest.
(3)	Shares held by the 2010 Kriens 20 Year Charitable Remainder Trust, of which the reporting person holds a pecuniary interest.
(4)	Held by the Kriens 1996 Trust U/T/A October 29, 1996 over which the Reporting Person and his spouse exercise investment and voting control.
(5)	Held by Saratoga Investments, LP over which the reporting person exercises voting and investment control.
(6)	The number of shares earned is based on achievement of certain Company performance targets for 2010, as determined by the Compensation Committee of the Board. The executive could earn between 0% and 250% of the target shares.
(7)	Column 8 is not an applicable reportable field.
(8)	Represents the unearned portion of the performance share award; remainder of share award cancelled as unearned.

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