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                                                                    EXHIBIT 99.1

PRESS CONTACT:                                     INVESTOR RELATIONS CONTACT:
Robyn Jenkins                                      Blair Christie
Cisco Systems, Inc.                                Cisco Systems, Inc.
(408) 853-9848                                     (408) 525-4856
rojenkin@cisco.com                                 blchrist@cisco.com

INDUSTRY ANALYST CONTACT:
Jim Harper
Cisco Systems, Inc.
(408) 525-8378
jiharper@cisco.com


        CISCO SYSTEMS TO ACQUIRE HAMMERHEAD NETWORKS AND NAVARRO NETWORKS
    Teams to Add Leading Technology for IP Aggregation and Ethernet Solutions

        SAN JOSE, Calif., May 1, 2002 -- Cisco Systems, Inc., today announced
definitive agreements to acquire privately-held Hammerhead Networks, Inc. of
Billerica, Massachusetts and Navarro Networks, Inc. of Plano, Texas. Hammerhead
Networks' software solutions will augment Cisco's industry-leading IP
aggregation portfolio consisting of cable, broadband and leased-line products.
Navarro Networks' ASICs design expertise will complement Cisco's continued
development of innovative Ethernet switching solutions. The potential
acquisitions of these two companies were previously described in Cisco's 10-Q
SEC filing for the second-quarter of fiscal year 2002.

        Hammerhead Networks develops high-performance software solutions that
accelerate the delivery of multiple IP service features such as billing,
security and Quality of Service (QoS) without degradation in network
performance. Under the terms of the agreement, Cisco common stock worth up to
$173 million will be exchanged for all outstanding shares and options of
Hammerhead Networks not already owned by Cisco. Cisco currently holds a minority
interest in Hammerhead Networks.

        Hammerhead Networks was founded in April 2000. The 85 employees of
Hammerhead Networks, led by chief executive officer, Eddie Sullivan, will join
the Cable Business Unit in Cisco's Network Edge and Aggregation Routing Group.

        Navarro Networks develops high-performance, cost-effective ASIC
components for the Ethernet market. Navarro Networks' technology will enhance
Cisco's internal development of new, high-end ASICs and increase ASIC
manufacturing flexibility on next-generation Ethernet switching platforms. Under
the terms of the agreement, Cisco common stock worth up to $85 million will be
exchanged for all outstanding shares and options of Navarro Networks not already
owned by Cisco. Cisco currently holds a minority interest in Navarro Networks.

        Navarro Networks was founded in March 2000. The 25 employees of Navarro
Networks, led by chief executive officer, Mark Bluhm, will join the Internet
Systems Business Unit in Cisco's Internet Switching and Services Group.

        In connection with the acquisitions of Hammerhead Networks and Navarro
Networks, Cisco expects a one-time combined charge for purchased in-process
research and development expenses not to exceed $0.02 per share. The
acquisitions have received all required approvals of each company and are
subject to various closing conditions and approvals. Both acquisitions are
expected to close in the fourth quarter of Cisco's fiscal year 2002.

ABOUT CISCO SYSTEMS

Cisco Systems, Inc. (NASDAQ: CSCO) is the worldwide leader in networking for the
Internet. News and information are available at www.cisco.com.

                                           # # #

Cisco, Cisco Systems, and the Cisco Systems logo are registered trademarks of
Cisco Systems, Inc. and/or its affiliates in the U.S. and certain other
countries. All other trademarks mentioned in this document are the property of
their respective owners.




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