- Statement of Changes in Beneficial Ownership (4)

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	OMB APPROVAL OMB Number: 3235-0287 Expires: February 28, 2011 Estimated average burden hours per response... 0.5
	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(f) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* REDPOINT VENTURES I LP	2. Issuer Name and Ticker or Trading Symbol BigBand Networks, Inc. [ BBND ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __ X __ 10% Owner _____ Officer (give title below) _____ Other (specify below)
(Last) (First) (Middle) C/O REDPOINT VENTURES, 3000 SAND HILL ROAD, SUITE 290	3. Date of Earliest Transaction (MM/DD/YYYY) 2/18/2011
(Street) MENLO PARK, CA 94025 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _ X _ 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. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	2/18/2011		S		73900	D	$2.61 ⁽¹⁾	0	I	By Broadband Fund, L.P.
Common Stock								887613	I	By Redpoint Technology Partners Q-I, L.P.
Common Stock								141831	I	By Redpoint Technology Partners A-I, L.P.
Common Stock								8984679	I	By Redpoint Ventures I, L.P.
Common Stock								283824	I	By Redpoint Associates I, LLC
Common Stock								2307624	I	By Redpoint Omega, L.P.
Common Stock								65255	I	By Redpoint Omega Associates, LLC

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:
( 1)	Price reflected is the weighted-average sale price for shares sold. The range of sale prices for the transactions reported was $2.56 to $2.70 per share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
REDPOINT VENTURES I LP C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X
REDPOINT TECHNOLOGY PARTNERS Q 1 LP C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X
REDPOINT TECHNOLOGY PARTNERS A 1 LP C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X
Broadband Fund, L.P. C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X
REDPOINT ASSOCIATES I LLC C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X
Redpoint Omega L P C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X
Redpoint Omega Associates, LLC C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X
BBF Management, LLC C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X
Redpoint Omega, LLC C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X
Redpoint Ventures I, LLC C/O REDPOINT VENTURES 3000 SAND HILL ROAD, SUITE 290 MENLO PARK, CA 94025		X

Signatures
/s/ Geoffrey Y. Yang as a Manager of BBF Management, LLC which serves as the General Partner of Broadband Fund, L.P.		2/18/2011
^** Signature of Reporting Person		Date
/s/ Geoffrey Y. Yang as a Manager of Redpoint Ventures I, LLC which serves as the General Partner of Redpoint Ventures I, L.P.		2/18/2011
^** Signature of Reporting Person		Date
/s/ Geoffrey Y. Yang as a Manager of Redpoint Ventures I, LLC which serves as the General Partner of Redpoint Technology Ventures Q-I, L.P.		2/18/2011
^** Signature of Reporting Person		Date
/s/ Geoffrey Y. Yang as a Manager of Redpoint Ventures I, LLC which serves as the General Partner of Redpoint Technology Ventures A-I, L.P.		2/18/2011
^** Signature of Reporting Person		Date
/s/ Geoffrey Y. Yang as a Manager of Redpoint Associates I, LLC		2/18/2011
^** Signature of Reporting Person		Date
/s/ Geoffrey Y. Yang as a Manager of Redpoint Omega, LLC which serves as the General Partner of Redpoing Omega, L.P.		2/18/2011
^** Signature of Reporting Person		Date
/s/ Geoffrey Y. Yang as a Manager of Redpoint Omega Associates, LLC		2/18/2011
^** Signature of Reporting Person		Date
/s/ Geoffrey Y. Yang as a Manager of BBF Management, LLC		2/18/2011
^** Signature of Reporting Person		Date
/s/ Geoffrey Y. Yang as a Manager of Redpoint Ventures I, LLC		2/18/2011
^** Signature of Reporting Person		Date
/s/ Geoffrey Y. Yang as a Manager of Redpoint Omega, LLC		2/18/2011
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	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).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.