1

                                        Filed Pursuant to Rule 424(b)(3) and (c)
                                                           File Number 333-47191


                   PROSPECTUS SUPPLEMENT DATED MARCH 12, 1999
                                       to
                         Prospectus Dated March 20, 1998

                                 420,889 SHARES

                               CISCO SYSTEMS, INC.

                                  COMMON STOCK

     This Prospectus Supplement supplements the Prospectus dated March 20, 1998
(the "Prospectus") of Cisco Systems, Inc. (the "Company") relating to the public
offering, which is not being underwritten, and sale by certain shareholders of
the Company or by pledgees, donees, transferees or other successors in interest
that receive such shares as a gift, partnership distribution or other non-sale
related transfer (the "Selling Shareholders") of 420,889 shares of Common Stock,
par value of $0.001 per share, of the Company (the "Common Stock") who received
such shares in connection with the acquisition by statutory merger of LightSpeed
International, Inc. ("LightSpeed"), by and through a merger of LightSpeed with
and into the Company. This Prospectus Supplement should be read in conjunction
with the Prospectus, and this Prospectus Supplement is qualified by reference to
the Prospectus except to the extent that the information herein contained
supersedes the information contained in the Prospectus. Capitalized terms used
in this Prospectus Summary and not otherwise defined herein have the meanings
specified in the Prospectus.

                              SELLING SHAREHOLDERS

    Footnotes (10) of the Prospectus (the "Footnote") is hereby amended to
include additional shareholders not specifically identified in the Prospectus as
Selling Shareholders. The shareholders identified in the Footnote below may
receive shares of Common Stock through partnership distributions The table of
Selling Shareholders in the Prospectus is hereby amended to include the
shareholders identified in the table below, including those listed in the
Footnote, as Selling Shareholders:

   2



                                                                             Number of
                                                                              Shares
                                  Number of Shares        Percent of       Registered for
                                     Beneficially        Outstanding            Sale
Name of Selling Shareholder          Owned                 Shares             Hereby(1)
- ---------------------------       ----------------       -----------       --------------
                                                                  
Vanguard V, L.P. 10                  420,889                  *               420,889



- ------------
* less than one percent


     1  This Registration Statement shall also cover any additional shares of
Common Stock which become issuable in connection with the shares registered for
sale hereby by reason of any stock dividend, stock split, recapitalization or
other similar transaction effected without the receipt of consideration which
results in an increase in the number of the Selling Shareholders' outstanding
shares of Common Stock.

     10 Subsequent to the date of this Prospectus Supplement, the shares
held by Vanguard V Venture Partners LLC., a limited partner of Vanguard V, L.P.,
may be distributed to Jack M. Gill, Laura Gwosden, Curtis K. Myers and Robert D.
Ulrich, in addition to those already listed in this footnote.