EXHIBIT 23.2

                      CONSENT OF INDEPENDENT ACCOUNTANTS

     We hereby consent to the incorporation by reference in this Registration
Statement on Form S-8 of our report dated August 22, 2000, except for the
information presented in Note 11 for which the date is September 7, 2000,
relating to the financial statements of Sycamore Networks, Inc., which appears
in Sycamore Networks, Inc.'s Annual Report on Form 10-K for the year ended July
31, 2000.  We also consent to the incorporation by reference in this
Registration Statement on Form S-8 of Sycamore Networks, Inc. of our report
dated June 4, 2000 relating to the financial statements of Sirocco Systems,
Inc., a development stage company, which appears in Amendment No. 1 to the
Registration Statement on Form S-4 of Sycamore Networks, Inc.


/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
December 21, 2000