Sample Business Contracts


Private Label Agreement and Project Development and License Agreement [Amendment No. 4] - Cisco Systems Inc. and Frontier Software Development Inc.


                               AMENDMENT NO. 4 TO
                             PRIVATE LABEL AGREEMENT
                                       AND
                    PROJECT DEVELOPMENT AND LICENSE AGREEMENT
                                     BETWEEN
                               CISCO SYSTEMS, INC.
                                       AND
                             NETSCOUT SYSTEMS, INC.


         This Amendment No. 4 ("Amendment #4"), having an Effective Date of
February 23, 1998, is made in California by and between Cisco Systems, Inc., a
California corporation having its principal place of business at 170 West Tasman
Drive, San Jose, CA 95134-1706, U.S.A. ("Cisco"), and NetScout Systems, Inc.,
(Formerly known as Frontier Software Development, Inc.) a Delaware corporation
having its principal place of business at 4 Technology Park Drive, Westford,
Massachusetts 01886 ("NetScout").

         WHEREAS, Cisco and NetScout entered into the Project Development and
License Agreement on July 13, 1994 ("Software Agreement"), as amended on January
4, 1995 ("Amendment #1") pursuant to which NetScout licensed certain software
products (as defined in the Software Agreement) to Cisco; and

         WHEREAS, Cisco and NetScout entered into the Private Label Agreement on
October 17, 1995 ("Hardware Agreement") pursuant to which NetScout is selling
certain products (as defined in the Hardware Agreement) to Cisco; and

         WHEREAS, Cisco and NetScout entered into an Amendment to the Hardware
Agreement and the Software Agreement on May 15, 1996 ("Amendment #2"); and

         WHEREAS, Cisco and NetScout entered into an Amendment to the Hardware
Agreement and the Software Agreement on October 29, 1996 ("Amendment #3"); and

         WHEREAS, Cisco and NetScout desire to change and add certain terms to
the Software Agreement, Hardware Agreement, Amendment #1, Amendment #2 and
Amendment #3 (collectively, the "Agreement") as specified below.

         NOW THEREFORE, in consideration of the covenants and conditions
contained herein, the parties agree as follows:

1.0      DEFINITIONS.

"Embedded Probes" are as defined in Section 3.0 of Amendment #3.



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<PAGE>

"Special Pricing" shall mean a discount structure different from the normal
discounts or royalties per the Agreement and conveyed to Cisco in writing
(letter, fax, or email) to be in effect for specific products, specific
customers, and a stated time period.

"Stand-alone Probes" shall mean all RMON probe product models covered under the
Agreement except Embedded Probes.

2.0      PROBE DISCOUNTS.

         Section 5.0 of Amendment #3 entitled "Probe Discount" is hereby
replaced with the following:

         (a) Base Discount. The base discount ("Base Discount") for Stand-alone
Probes shall be [*] off NetScout's published U.S. List Price (U.S. List Price is
defined in the Revised Exhibit A of Amendment #2). Base Discount applies to all
Stand-alone Probes currently covered under the Agreement plus any new models of
Stand-alone Probes subsequently added under the Agreement.

         (b) Incremental Volume Discount. Based upon the total dollar volume for
all Stand-alone Probes purchased by Cisco during Cisco's previous fiscal
quarter, but excluding any products purchased with Special Pricing, Cisco shall
receive an additional incremental discount ("Incremental Volume Discount") in
addition to the Base Discount as follows:



---------------------------------   ---------------------------
                                    INCREMENTAL VOLUME
TOTAL QUARTERLY STAND-ALONE         DISCOUNT IN PERCENT FOR
PROBE PURCHASES IN DOLLARS          NEXT QUARTER
---------------------------------   ---------------------------

                                 
[*]
---------------------------------   ---------------------------
---------------------------------   ---------------------------

---------------------------------   ---------------------------
---------------------------------   ---------------------------

---------------------------------   ---------------------------
---------------------------------   ---------------------------

---------------------------------   ---------------------------
---------------------------------   ---------------------------

---------------------------------   ---------------------------
---------------------------------   ---------------------------

---------------------------------   ---------------------------
---------------------------------   ---------------------------

---------------------------------   ---------------------------



         Given the need to complete the accounting for Cisco's previous fiscal
quarter to determine the Incremental Volume Discount for the current quarter,
the Incremental Volume Discount for a given quarter shall apply for all purchase
orders placed four or more weeks after the start of said Cisco fiscal quarter
and shall continue through the first four weeks of the

[*]INDICATES MATERIAL THAT HAS BEEN OMITTED AND FOR WHICH CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED. ALL SUCH OMITTED MATERIAL HAS BEEN FILED WITH THE SECURITIES
AND EXCHANGE COMMISSION PURSUANT TO RULE 406 PROMULGATED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED.




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<PAGE>


subsequent Cisco fiscal quarter. The dollar volume shall be measured in terms of
the actual purchase prices for all purchase orders for Standalone Probes ordered
by Cisco (excluding units purchased under Special Pricing).

         (c) Special Pricing. If the parties have agreed to Special Pricing for
a particular competitive situation, Cisco shall reference said Special Pricing
in its purchase orders placed with NetScout for which Special Pricing applies.

         (d) Effectivity of Discounts for Stand-alone Probes. The discounts per
this Section 2 shall apply as of the Effective Date of this Amendment #4 and
shall continue in effect until the termination or expiration of the Agreement.
Any Incremental Volume Discounts shall apply beginning with the first complete
fiscal quarter after the Effective Date of this Amendment #4.

         (e) Minimum purchase requirement. Should Cisco purchases of probes fall
below [*] for [*], as calculated above, Cisco's price for the subsequent quarter
shall be as specified in the Hardware Agreement, attachment A.

3.0 RMON EMBEDDED AGENT SOFTWARE FOR IOS.

         The parties hereby cancel the licensing transaction agreed to in
Section 2.2 (a) of Amendment #3 such that NetScout is not obligated to deliver
or license RMON Embedded Agent Software to Cisco for inclusion in [*] software
and Cisco is not obligated to make the [*] payment to NetScout .

4.0      PROBE SALES INCENTIVE PROGRAM.

         The parties hereby establish a Probe Sales Incentive Program which
shall: (a) be in effect for Cisco's [*], beginning [*] and ending on [*] (b) be
in effect only for fiscal quarters where Cisco's probe orders placed with
NetScout in that quarter meet or exceed [*], and (c) provide a credit of [*] on
the first [*] of probe-only product ordered in the quarter (a maximum credit of
[*] per quarter) at Cisco's applicable probe discount per Section 2 above. The
credit shall be calculated at the end of each quarter, apply to any open
invoice, and be issued by NetScout within 45 days of the close of each
applicable Cisco fiscal quarter.

5.0      TRAFFICDIRECTOR LICENSING.

         Notwithstanding anything to the contrary in the Agreement, the
licensing practice for end users of Traffic Director 5.1, and subsequent
releases, embedded within CWSI shall be as follows:


[*]INDICATES MATERIAL THAT HAS BEEN OMITTED AND FOR WHICH CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED. ALL SUCH OMITTED MATERIAL HAS BEEN FILED WITH THE SECURITIES
AND EXCHANGE COMMISSION PURSUANT TO RULE 406 PROMULGATED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED.



Cisco Systems Confidential Information                                  Page 3

<PAGE>

         (a) Cisco shall apply the same end user license to Traffic Director
embedded within CWSI as Cisco requires of its end user customers for the rest of
the functionality of CWSI. If Cisco changes its licensing practice for CWSI, it
will apply the same new license practice to Traffic Director after consultation
with and approval by NetScout.

         (b) Cisco shall apply the same diligence in protecting Traffic Director
as it does for its own intellectual property in CWSI and shall continue to meet
all conditions within existing agreements between the parties to protect
NetScout's intellectual property.

         (c) In the event that Cisco becomes aware of any documented and
substantive misuse of the CWSI license as applied to TrafficDirector, Cisco
shall apply commercially reasonable efforts to assure that the licensing
requirements of CWSI as applied to Traffic Director are met by end users, and
further Cisco shall [*] to NetScout any [*] even in the case in which the [*] to
Cisco.

         (d) Cisco shall continue to account for its royalties due for Traffic
Director per the process currently in place between the parties.

6.0      INVENTORY CREDIT.

The parties acknowledge that Cisco has returned to NetScout [*] units of [*]
which were [*] by Cisco at a [*] of [*]. NetScout agrees to immediately credit
Cisco for this return, in the amount of [*]. Cisco hereby transfers to NetScout
ownership of said returned Stand-alone Probes.

7.0      DOCUMENTATION.

         For all new products, bug fixes and product updates provided to Cisco
for acceptance testing under this Agreement, NetScout shall apply reasonable
commercial efforts to provide the following documentation:

          Functional specifications Design specifications (as available as a
          standard NetScout documents)

          Test plans, test cases, and test results for key features

          Test plans, test cases and test results for system tests

[*]INDICATES MATERIAL THAT HAS BEEN OMITTED AND FOR WHICH CONFIDENTIAL TREATMENT
HAS BEEN REQUESTED. ALL SUCH OMITTED MATERIAL HAS BEEN FILED WITH THE SECURITIES
AND EXCHANGE COMMISSION PURSUANT TO RULE 406 PROMULGATED UNDER THE SECURITIES
ACT OF 1933, AS AMENDED.



Cisco Systems Confidential Information                                  Page 4

<PAGE>


IN WITNESS WHEREOF, the parties have caused this Amendment to be executed by
their duly authorized representatives effective as of the last date given below.


CISCO SYSTEMS, INC.                        NETSCOUT SYSTEMS, INC.

/s/ MARIO MAZZOLA                          /s/ ANIL SINGHAL
-----------------------------------        -----------------------------------
Signature                                  Signature


MARIO MAZZOLA                              ANIL SINGHAL
-----------------------------------        -----------------------------------
Name                                       Name


SVP ELOB                                   CEO
-----------------------------------        -----------------------------------

Title                                      Title


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