April 27, 2007

Securities and Exchange Commission
Division of Corporation Finance
100 F Street, N.E.
Washington, DC 20549

Re:  Cavium Networks, Inc.
Form S-1 Registration Statement
Registration File No. 333-140660

Ladies and Gentlemen:

The undersigned registrant hereby requests that the Securities and Exchange Commission (the “Commission”) take appropriate action to cause the above-referenced Registration Statement on Form S-1 (the “Filing”) to become effective at 3:00 p.m. Eastern Time on May 1, 2007 or as soon thereafter as is practicable.

In connection with this request, the undersigned registrant hereby acknowledges that:

     (i)     should the Commission or the staff of the Commission (the “Staff”), acting pursuant to delegated authority, declare the Filing effective, it does not foreclose the Commission from taking any action with respect to the Filing;

     (ii)     the action of the Commission or the Staff, acting pursuant to delegated authority, in declaring the Filing effective, does not relieve the undersigned registrant from its full responsibility for the adequacy and the accuracy of the disclosure in the Filing; and

     (iii)     the undersigned registrant may not assert Staff comments and the declaration of effectiveness as a defense in any proceeding initiated by the Commission or any person under the federal securities laws of the United States.

Very truly yours,

Cavium Networks, Inc.

By:	/s/ Syed B. Ali
	Syed B. Ali
	President and Chief Executive Officer

cc:  Arthur D. Chadwick, Cavium Networks, Inc.
Vincent P. Pangrazio, Esq., Cooley Godward Kronish llp